Official .260 tOBR Thread-Pics/Range/Loads/Updated Thread Index (Page 15 of 188)
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Originally Posted By mettee:
My Gorilla with Peterson brass has a "P" stamp, are you sure it's an "A"? My Gorilla has the "P"; my Alpha has the "a" similar in style to the Gorilla, leading me to believe it could be Peterson brass. The empty brass wasn't a bad price at all, the loaded ammo was 330 or so for 200 rounds with the berger ar hybrids, so I figured that is value added since that is one of the bullets I want to be able to use, Might grab 200 more sometime soon. Let us know how it shoots. D3, when you dismantled one of the gorilla rounds.... Was the powder varying in length? Originally Posted By mettee:
Originally Posted By Defender3:
Thanks for keeping the thread alive with a range report! Repeat after me, it’s a dry heat. Ha, an Excursion, you could fit a fire team with gear in that thing, the only down side is 10mpg. Do you have any MV data for your .260, I believe you’re shooting the 18” version? Was the radius accurate? I thought mine was right on when I was at the 800 yard line. Now that's interesting. Mine is similarly marked, but my Alpha brass is stamped "Alpha" but it has a curly "a" to the side like the Gorilla / Peterson. I ordered 100 of the Peterson's this morning and it was $83.95 with shipping to the Commonwealth for 0.84 cents a round versus the Alpha which was $112.15 per 100 or $1.12 a round. My Gorilla has the "P"; my Alpha has the "a" similar in style to the Gorilla, leading me to believe it could be Peterson brass. The empty brass wasn't a bad price at all, the loaded ammo was 330 or so for 200 rounds with the berger ar hybrids, so I figured that is value added since that is one of the bullets I want to be able to use, Might grab 200 more sometime soon. Let us know how it shoots. D3, when you dismantled one of the gorilla rounds.... Was the powder varying in length? Yes, it looks like it has three different lengths: 
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I started depriming some brass and getting it ready for reloading today, but I had to go to a membership meeting at the local range so today's tech update is pretty simple.
The local Izaak Walton has two small ponds, camping, archery, rifle/pistol and shotgun ranges spread over 210 acres. It's a short walk past the pond and shotgun range to the clubhouse: 
Going back to the pressure issue I created by having my ammo in direct sun, here's a quick update where I took a fired case and left it in direct sun for 5 minutes on a 72* day. The first picture shows the case temp while it was sitting inside. The second pic is after being in direct sun for 5 minutes on a 72* day. I can only assume how hot the ammo was on that 90* day in direct sun. I'll test that once we have another 90* day, but it looks like it will be cooler with rain for the week. 
Come on people, throw something up and keep the thread ALIVE! |
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^ Can't, mark won't let the rest of us play 
I just bought some of the FGMM 185 bergers to try out, painful to pay for shipping on one box of ammo but probably still cheaper than going to my local rip off of a gun store. 10 rounds for the tOBR and 10 rounds for the AI AT. |
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Originally Posted By bfk4lyfe:
^ Can't, mark won't let the rest of us play
I just bought some of the FGMM 185 bergers to try out, painful to pay for shipping on one box of ammo but probably still cheaper than going to my local rip off of a gun store. 10 rounds for the tOBR and 10 rounds for the AI AT. |
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Originally Posted By Defender3:
ETA -Missed page 15 ownage. Yes, it looks like it has three different lengths: https://www.AR15.Com/media/mediaFiles/52736/IMG-4838-213250.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4839-213248.jpg Ill try and post a pic |
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Originally Posted By Defender3:
I started depriming some brass and getting it ready for reloading today, but I had to go to a membership meeting at the local range so today's tech update is pretty simple. The local Izaak Walton has two small ponds, camping, archery, rifle/pistol and shotgun ranges spread over 210 acres. It's a short walk past the pond and shotgun range to the clubhouse: https://www.AR15.Com/media/mediaFiles/52736/IMG-4830-213262.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4831-213263.jpg Going back to the pressure issue I created by having my ammo in direct sun, here's a quick update where I took a fired case and left it in direct sun for 5 minutes on a 72* day. The first picture shows the case temp while it was sitting inside. The second pic is after being in direct sun for 5 minutes on a 72* day. I can only assume how hot the ammo was on that 90* day in direct sun. I'll test that once we have another 90* day, but it looks like it will be cooler with rain for the week. https://www.AR15.Com/media/mediaFiles/52736/IMG-4805-211836.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4804-211837.jpg Come on people, throw something up and keep the thread ALIVE! |
Carry it, shoot it. (repeat forever)
Hard Livin' Clean Given' Cool Driven. - WWIIWMD
God Bless Texas
"... it's the socialism, stupid." - RL
Hard Livin' Clean Given' Cool Driven. - WWIIWMD
God Bless Texas
"... it's the socialism, stupid." - RL
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[b]
Going back to the pressure issue I created by having my ammo in direct sun, here's a quick update where I took a fired case and left it in direct sun for 5 minutes on a 72* day. The first picture shows the case temp while it was sitting inside. The second pic is after being in direct sun for 5 minutes on a 72* day. I can only assume how hot the ammo was on that 90* day in direct sun. I'll test that once we have another 90* day, but it looks like it will be cooler with rain for the week. https://www.AR15.Com/media/mediaFiles/52736/IMG-4805-211836.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4804-211837.jpg Come on people, throw something up and keep the thread ALIVE! I know back when me and @spartandieseltech first got our tOBRs and was looking for a good load for them.. we had issues with Black Hills 175gr being more temp sensitive to being left in a hot chamber for a while and shooting high because of an increased MV.. had no issues with FGMM and have shot that exclusively since |
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Originally Posted By Blaster7R:
What ammo was that with again? Prime ? have any issues with any other ammo under similar circumstances ? I know back when me and @spartandieseltech first got our tOBRs and was looking for a good load for them.. we had issues with Black Hills 175gr being more temp sensitive to being left in a hot chamber for a while and shooting high because of an increased MV.. had no issues with FGMM and have shot that exclusively since Originally Posted By Blaster7R:
[b]
Going back to the pressure issue I created by having my ammo in direct sun, here's a quick update where I took a fired case and left it in direct sun for 5 minutes on a 72* day. The first picture shows the case temp while it was sitting inside. The second pic is after being in direct sun for 5 minutes on a 72* day. I can only assume how hot the ammo was on that 90* day in direct sun. I'll test that once we have another 90* day, but it looks like it will be cooler with rain for the week. https://www.AR15.Com/media/mediaFiles/52736/IMG-4805-211836.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4804-211837.jpg Come on people, throw something up and keep the thread ALIVE! I know back when me and @spartandieseltech first got our tOBRs and was looking for a good load for them.. we had issues with Black Hills 175gr being more temp sensitive to being left in a hot chamber for a while and shooting high because of an increased MV.. had no issues with FGMM and have shot that exclusively since As to the Black Hills, you also pick up MV when the temps increase, which could have been the issue, or are you saying the FGMM did not have the same elevation issues? |
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Originally Posted By mettee:
If you or I can sync up for some range time I'll spot 
I hear there are some tricks for when it ls that bright, and you can't focus in addition to the mirage. Kinda like a pair of sunglasses for your optic. If you don't mind trying it, grab some IMR 4451 |
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Originally Posted By rugerdog:
I think I might have some. I'll check. I am sure there are good spots to shoot distance between Boulder City and Phoenix. We'll have to get together. 
I should be 260'd up here shortly. Trying to decide on optics.... ATACR or the MK8 Leupold. Both are approx 38 oz, same reticle, same cost'ish |
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Originally Posted By mettee:
.....there may be one or two spots somewhere here in AZ
I should be 260'd up here shortly. Trying to decide on optics.... ATACR or the MK8 Leupold. Both are approx 38 oz, same reticle, same cost'ish Originally Posted By mettee:
Originally Posted By rugerdog:
I think I might have some. I'll check. I am sure there are good spots to shoot distance between Boulder City and Phoenix. We'll have to get together.
I should be 260'd up here shortly. Trying to decide on optics.... ATACR or the MK8 Leupold. Both are approx 38 oz, same reticle, same cost'ish 
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Sort of a tech update, my Mausingfield came back from LRI after being rebarreled. I had the K&P 308 barrel removed and a Krieger 1/8, 5R, Palma in 260 installed. I had it cut to 24", the SOCOM brake installed and Cerakoted, as well as chambered with a Match reamer that gives me 0.095 freebore. I'll have to get it to the range and break in the barrel, then get some MVs, then get it out to long range, but this closes out one of many projects. Next up is a 6.5CM barrel for the LaRue, but that might take a bit while I decide what and how. The next updates will start the reloading process.
Sorry for the busy picture but it's as good as it gets right now. Awaiting the Razor HD Gen II, which will adorn this rifle once I do some measurements and determine the right height over the bore for a 56mm objective on a 34mm tube.
ETA - That's a JAE 700 chassis. I'm a sort of old school type and preferred the JAE over some others. I liked it so much I also got one for my M14. I'm also still waiting on my Alpha mags which allow a longer COAL than the AI mags.
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Originally Posted By Defender3:
Sort of a tech update, my Mausingfield came back from LRI after being rebarreled. I had the K&P 308 barrel removed and a Krieger 1/8, 5R, Palma in 260 installed. I had it cut to 24", the SOCOM brake installed and Cerakoted, as well as chambered with a Match reamer that gives me 0.095 freebore. I'll have to get it to the range and break in the barrel, then get some MVs, then get it out to long range, but this closes out one of many projects. Next up is a 6.5CM barrel for the LaRue, but that might take a bit while I decide what and how. The next updates will start the reloading process. https://www.AR15.Com/media/mediaFiles/52736/IMG-4844-214096.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4851-214098.jpg https://www.AR15.Com/media/mediaFiles/52736/IMG-4853-214099.jpg Sorry for the busy picture but it's as good as it gets right now. Awaiting the Razor HD Gen II, which will adorn this rifle once I do some measurements and determine the right height over the bore for a 56mm objective on a 34mm tube.
ETA - That's a JAE 700 chassis. I'm a sort of old school type and preferred the JAE over some others. I liked it so much I also got one for my M14. I'm also still waiting on my Alpha mags which allow a longer COAL than the AI mags.
https://www.AR15.Com/media/mediaFiles/52736/IMG-4849-214097.jpg |
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Originally Posted By mettee:
I had one, didnt keep it.... Originally Posted By mettee:
Originally Posted By Defender3:
I just got my shipping notice for my Vortex Razor HD Gen II. |
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Originally Posted By mettee:
those are dam fine actions....I bet it shoots like a laser 
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260 sparrel shipped today. Should be here tomorrow. Case of prime standing by as well. 
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Originally Posted By JonLSU:
260 sparrel shipped today. Should be here tomorrow. Case of prime standing by as well.
P.S. Spuhr SP-4002 on a 2-day from Mile High. Maybe, just maybe the Gen II will arrive in time for weekend fun, or the backup plan is to mount the regular old Razor HD. |
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Originally Posted By mettee:
.....there may be one or two spots somewhere here in AZ
I should be 260'd up here shortly. Trying to decide on optics.... ATACR or the MK8 Leupold. Both are approx 38 oz, same reticle, same cost'ish |
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One of my two .260 barrels has shipped. The other was an earlier order number so I suspect it will ship soon. Unfortunately range time will have to wait for a bit. We are severely understaffed at work and free time is at a premium.
I appreciate all of the information being shared in this thread. Keep it coming. |
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Originally Posted By Defender3:
As to the Black Hills, you also pick up MV when the temps increase, which could have been the issue, or are you saying the FGMM did not have the same elevation issues? All I am saying is.. another load may have powder in it that is not quite as temp sensitive. . |
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Originally Posted By Defender3:
It's like prying teeth with you sometimes...why didn't you keep it?...was it the weight or some other reason? I think that the glass is good...yes. I dont like the reticle I think the lines are thicker than need be and are not crisp. I think it is built like a tank yes, I love the dials, and the overall build. I dont like 48 oz |
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Originally Posted By Defender3:
It shot very well, here's a 0.534MOA group. I had barely broken in the barrel and then it was off to be replaced. I think the .260 will do as well as I can shoot, so it will be up to me to eek out everything it has. I also intend to leave the SOCOM 762RC on it and keep the TQs on the LaRues. https://www.AR15.Com/media/mediaFiles/52736/DSC-0580-1-214129.jpg I still have not been pulled away from surefire. I really like the mounting system and the muzzle devices. If HPA goes I will be trying a bunch of cans 
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Originally Posted By mettee:
Oh sorry buddy, I didnt meant to I just dont want to say negative stuff. I think that the glass is good...yes. I dont like the reticle I think the lines are thicker than need be and are not crisp. I think it is built like a tank yes, I love the dials, and the overall build. I dont like 48 oz Originally Posted By mettee:
Oh sorry buddy, I didnt meant to I just dont want to say negative stuff. I think that the glass is good...yes. I dont like the reticle I think the lines are thicker than need be and are not crisp. I think it is built like a tank yes, I love the dials, and the overall build. I dont like 48 oz
Originally Posted By Fr8dog:
One of my two .260 barrels has shipped. The other was an earlier order number so I suspect it will ship soon. Unfortunately range time will have to wait for a bit. We are severely understaffed at work and free time is at a premium. I appreciate all of the information being shared in this thread. Keep it coming. Originally Posted By Blaster7R:
You could shoot a string of fire.. you know get the gun good and hot.. leave a round in the chamber mid mag.. for a min or so.. so it would heat it up.. then the round in the chamber would shoot over a mil high at 900+ yards.. did not have the same issue with the FGMM. The loads where using different powder.. ( don't remember off the top of my head am not in to reloading that much) it was a pretty documented issue a while back.. All I am saying is.. another load may have powder in it that is not quite as temp sensitive. . Originally Posted By SuperJlarge:
I'm not sure you'll need the added mag length to get to the lands, even with hybrids. This could be a good thing since the Magpul mags are so inexpensive! Keep us updated. Originally Posted By mettee:
I like your style D3. I still have not been pulled away from surefire. I really like the mounting system and the muzzle devices. If HPA goes I will be trying a bunch of cans |
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Attend the class yesterday and it was a great time and learned some new things. First, rifle performed perfectly. However the combo of the rifle and Prime ammo showed some signs of overpressure still. I will definitely have to watch the temperature as it warms up and pay attention to keep the Prime from baking. Next, I'm 100% happy with the Vortex Razor Gen II HD - It was perfect, and between the rifle and the optic made me look like a much better shooter than I really am. 160 rounds down range for the day.
The course was great - learned a lot of new drills. Was able to shoot at 100, 200, 300, 400 and 550 yards, both paper and steel. The range was awesome, and I would be member if it was not 2 hours away. I have one that is closer that I'm going to need to learn more about. Highlight of the day was at the end one of the drills ringing a half size silhouette steel target all three time on center at 550 yds. 
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Additional information from the training:
- chrono measured 2855 ft/sec in the mid morning. - Dope in Mil - There was a definite shift from morning to afternoon. Not sure it the barrel is speeding up (only 74 rounds prior), the temperature/environment change, or a combination. 210 yards - .3 in the morning, ended at .1 310 yards - .9 in the morning, ended at .8 405 yards - 1.4 in the morning, ended at 1.2 525 yards - 2.8 in the morning, ended at 2.2 |
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Originally Posted By SmokieRiver:
Attend the class yesterday and it was a great time and learned some new things. First, rifle performed perfectly. However the combo of the rifle and Prime ammo showed some signs of overpressure still. I will definitely have to watch the temperature as it warms up and pay attention to keep the Prime from baking. Next, I'm 100% happy with the Vortex Razor Gen II HD - It was perfect, and between the rifle and the optic made me look like a much better shooter than I really am. 160 rounds down range for the day. The course was great - learned a lot of new drills. Was able to shoot at 100, 200, 300, 400 and 550 yards, both paper and steel. The range was awesome, and I would be member if it was not 2 hours away. I have one that is closer that I'm going to need to learn more about. Highlight of the day was at the end one of the drills ringing a half size silhouette steel target all three time on center at 550 yds. http://i36.photobucket.com/albums/e26/SmokieRiver/20170522_120523_zpsqxnaupu9.jpg http://i36.photobucket.com/albums/e26/SmokieRiver/18700538_621781754683049_5680397862782072101_o_zpsmlpitjzn.jpg |
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Originally Posted By Defender3:
Excellent, it's a great feeling when you're banging steel at distance! Sounds like you had a great time and the 260 (and you) performed well. I appreciate you taking the time to follow and contribute to the thread. |
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Originally Posted By SmokieRiver:
The part the was new and interesting to me was at 500+ yds to hear the round fire, >.5 sec later see the target move, hear the spotter say hit, and then hear the 'clang' nearly a second later. That time delay, especially doing the 200yd to 400 yd alternate timed drill, felt like forever. |
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Originally Posted By SmokieRiver:
Additional information from the training: - chrono measured 2855 ft/sec in the mid morning. - Dope in Mil - There was a definite shift from morning to afternoon. Not sure it the barrel is speeding up (only 74 rounds prior), the temperature/environment change, or a combination. 210 yards - .3 in the morning, ended at .1 310 yards - .9 in the morning, ended at .8 405 yards - 1.4 in the morning, ended at 1.2 525 yards - 2.8 in the morning, ended at 2.2 |
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Originally Posted By rugerdog:
The powder Prime is using sure seems to be pressure sensitive. Did you guys ever figure out what they are using? I have not ordered any yet. |
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I was going to do a tech update with the reloading process but I hit a snag in that I have a non-bushing die and to get the neck tension I want for a gasser, I think it best to get a bushing die. I ordered from Whidden and should have it this weekend so I'll do a reloading update then. In the meantime, I do have this to add, the beast has arrived! Yes, I'm a MOA guy (I cling to the past), so the Mil/Mil thing will just have to pass me in the fast lane! Seriously though, this scope is massive, built well and I'm liking these L-tech turrets. I also like the reticle and while it only has two subdivisions per MOA, versus some optics having have four divisions, it works for me. My Spuhr should be here tomorrow so I'll get this mounted on the Mausingfield and then it's off to the range Friday for some more range time.
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Originally Posted By jaycoux:
Those changes seem....excessive....at those ranges. Plug the data into a ballistic solver and you will see what I mean. |
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Originally Posted By SmokieRiver:
I would tend to agree, but that is what happened during the day. Confirmed the zero in the morning and again at the end. I run Strelok Pro, and the calcs are not even close to what I was dialing throughout the day. I was talking to the instructors about it, and they were saying barrel, change in temp and humidity, and/or the light on the range. They mentioned a time lapse video that Vortex did (tried to find and could not) that had a scope focused on a target all day and showed how the change in light effected what you see through the scope (POA). Originally Posted By SmokieRiver:
Originally Posted By jaycoux:
Those changes seem....excessive....at those ranges. Plug the data into a ballistic solver and you will see what I mean. Originally Posted By SmokieRiver:
Originally Posted By Defender3:
Were you able to see the bullet trail on the longer shots? It's pretty cool to see the bullet coming in from the 2 o'clock. |
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