User Panel
User Panel
User Panel
|
Posted: 9/20/2017 11:18:04 PM EDT
So after a long wait of money, parts, build time, and procrastination on my part I finally got some rounds down range on my bolt action .300 Norma Mag
Manners Stock Bartlein Barrel Timney trigger Stiller TAC 338 action TPS Rings Vortex Razor HD Gen II (4.5-27x56) 
I did: 87 grains of Retumbo Federal 215 Mag rifle primers Norma Brass Berger 230 OTM projectiles This load I used to get on paper and generally sighted in on Sunday 9/17. Today 9/20 I did a ladder test. 12 rounds 12 different powder weights (.4 grain intervals) This is what I produced at 100 yards using a Lead Sled. POA is the bullseye. 
I am going to take what I feel are the closest loads that grouped together, do 5 rounds of each, and see how they group. I should get that done this Saturday. |
|
|
|
GA, USA
|
Posted: 9/21/2017 1:16:17 AM EDT
[#1]
Can you test at a further distance, such as 300 yards? It'll likely tell you more than at 100.
Also...I'd suggest ditching the lead sled. Nice rifle! Should be a great ELR rig. |
|
|
|
Posted: 9/21/2017 6:32:18 AM EDT
[#2]
Nice rig
|
|
|
|
|
Posted: 9/21/2017 8:34:31 AM EDT
[Last Edit: 40xb]
[#3]
Quote HistoryOriginally Posted By SuperJlarge:
Can you test at a further distance, such as 300 yards? It'll likely tell you more than at 100. Also...I'd suggest ditching the lead sled. Nice rifle! Should be a great ELR rig. I can redo the ladder test at 200 or 300 on Saturday, take those results, then reload and shoot the groups on Sunday. ETA: What is wrong with the lead sled? Is there something better to use for testing loads and correcting POA/POI when the time comes? |
|
|
|
|
Posted: 9/21/2017 8:57:17 AM EDT
[#4]
Cool rifle. The first magnum caliber rifle I shot was a .308 Norman mag. I think it was a Parker Hale. Damnit man that was a long time ago. I think I was so scared I missed the target so bad that bullet is still going.
 Then I figured out it wasn't as bad as a 12 gauge with heavy magnum loads. Next round was a little high and about an inch left.
|
|
|
|
|
Posted: 9/21/2017 11:20:02 AM EDT
[#5]
Quote HistoryOriginally Posted By sparkyD:
Cool rifle. The first magnum caliber rifle I shot was a .308 Norman mag. I think it was a Parker Hale. Damnit man that was a long time ago. I think I was so scared I missed the target so bad that bullet is still going. Then I figured out it wasn't as bad as a 12 gauge with heavy magnum loads. Next round was a little high and about an inch left.I was nervous at first as well. This is my first true LR precision rifle. With the brake that is on there it kicks a tad harder than a .308 to my best estimation. So after the first shot I was like "Hey, that wasn't so bad". |
|
|
|
|
Posted: 9/21/2017 11:55:33 AM EDT
[#6]
The best way to look for nodes IMO is run you ladder test over a chrono. Does the same thing as shooting at 300, but gives you the data.
Im not a big fan of lead sleds either since they aren't a normal shooting position or recoil pattern. |
|
|
|
UT, USA
|
Posted: 9/21/2017 12:29:34 PM EDT
[#7]
Quote HistoryOriginally Posted By TeeRex:
The best way to look for nodes IMO is run you ladder test over a chrono. Does the same thing as shooting at 300, but gives you the data. Im not a big fan of lead sleds either since they aren't a normal shooting position or recoil pattern. |
|
|
|
Posted: 9/21/2017 12:33:33 PM EDT
[#8]
Thanks for the responses guys. I am new to all this and I appreciate the help and tips. I have a hunting trip to WY coming up in 1.5 weeks and I planned on this being my primary firearm. I will do as much as I can to get this done properly.
|
|
|
|
USA
|
Posted: 9/21/2017 7:31:46 PM EDT
[#9]
Quote HistoryOriginally Posted By 40xb:
ETA: What is wrong with the lead sled? |
|
|
IA, USA
|
Posted: 9/21/2017 8:17:33 PM EDT
[#10]
Quote HistoryOriginally Posted By ICU:
Been some talk of cracked stocks & beat optics... |
|
|
USA
|
Posted: 9/22/2017 12:25:15 PM EDT
[#11]
Quote HistoryOriginally Posted By F224:
Any examples? |
|
|
|
Posted: 9/25/2017 1:32:00 PM EDT
[#12]
Ok so update. I shot groups of 4 different powder charges and got FPS data.
89.2 gr Retumbo = 3112 fps avg 
89.6 gr Retumbo = 3141 fps avg 
90.0 gr Retumbo = 3167 fps avg 
90.4 gr Retumbo = 3187 fps avg 
I chose the 89.2 gr to do further testing the next day. I did drop using the lead sled. I feel like I could shoot better than what is shown here but I need practice for sure. So here is how I did knowing that I screwed up some of my shots: Volley 1 (100 yards) 
Volley 2 (100 yards) 
Volley 3 (100 yards) 
Volley 4 (300 yards) 
|
|
|
|
GA, USA
|
Posted: 9/25/2017 5:54:15 PM EDT
[#13]
Any idea what the std dev. was for the loads?
Did you tune out the parallax? Noticed that the groups shifted around. If it wasn't you, it could be a parallax issue. |
|
|
|
Posted: 9/25/2017 9:17:50 PM EDT
[#14]
Quote HistoryOriginally Posted By SuperJlarge:
Any idea what the std dev. was for the loads? Did you tune out the parallax? Noticed that the groups shifted around. If it wasn't you, it could be a parallax issue. |
|
|
|
IA, USA
|
Posted: 9/26/2017 10:56:30 AM EDT
[#15]
Looks typical for a well set up 300 Norma Mag, with the bullets going to sleep and the groups staying pretty tight at longer range. Nice set up.
|
|
|
|
Posted: 9/26/2017 12:05:05 PM EDT
[#16]
Lol, 3100 fps from 230otms
Mine are 2300fps and 2400fps for single feed out of my .308win. So envious of your velocity. 
Supersonic to about 1900yds or more. |
|
|
|
|
Posted: 9/26/2017 12:20:22 PM EDT
[#17]
Slightly off topic...how do you like that Vortex?
|
|
|
|
|
Posted: 9/26/2017 12:27:53 PM EDT
[#18]
Quote HistoryOriginally Posted By Jkbulldogg:
Slightly off topic...how do you like that Vortex? |
|
|
|
|
Posted: 9/26/2017 2:26:02 PM EDT
[#19]
Quote HistoryOriginally Posted By 40xb:
I love it. I have two more on my 6.5 Creedmoor rifles.
|
|
|
|
|
Posted: 9/26/2017 2:50:53 PM EDT
[#20]
Quote HistoryOriginally Posted By Jkbulldogg:
Quote HistoryOriginally Posted By Jkbulldogg:
Originally Posted By 40xb:
I love it. I have two more on my 6.5 Creedmoor rifles. 
DPMS LR-308 chassis, with a Kreiger barrel, PRS stock Bergara B-14 HMR (all stock) |
|
|
|
UT, USA
|
Posted: 9/27/2017 3:29:25 AM EDT
[#21]
Quote HistoryOriginally Posted By F224:
Looks typical for a well set up 300 Norma Mag, with the bullets going to sleep and the groups staying pretty tight at longer range. Nice set up. |
|
|
IA, USA
|
Posted: 9/27/2017 10:21:28 PM EDT
[#22]
Quote HistoryOriginally Posted By chocolateisyummy2:
Bullets going to sleep is just a myth. Bryan Litz test it in Modern advancements in long range shooting volume 2. It’s called epicyclic swerve but a bullet only needs to travel 15-50 yards to dampen out its initial pitching and yawing motion. Group size grows proportional with range. |
|
|
|
Posted: 9/29/2017 9:27:46 AM EDT
[#23]
Quote HistoryOriginally Posted By F224:
I'm well familiar with the term, in my experience it happens at ranges from 50-150 yards. I have shot and seen multiple NRA HighPower match rifles that would shoot at one MOA at 100 yards, and hold less than 1/3 MOA at 300-500-600. The heavier the bullet, the longer it takes to settle down. Does it take hundreds of yards? Nope but the heavies can take 100-150 yards to get there. Please tell me what force is changing the flight path. The bullet is heading off to the left at 1/2moa(1moa total), now supposedly the bullet "goes to sleep" or stops wobbling basically and then changes directions and starts heading to the right to end up .165moa(1/3rd moa total) left. What caused the direction change? Why didn't it just continue on its path from the point of stability? I shoot 230gr otms in my .308, 147s in my 6.5, 90gr smks in my .223 I have never experience group convergence. |
|
|
|
|
Posted: 10/9/2017 11:38:27 PM EDT
[#24]
Quote HistoryOriginally Posted By F224:
I'm well familiar with the term, in my experience it happens at ranges from 50-150 yards. I have shot and seen multiple NRA HighPower match rifles that would shoot at one MOA at 100 yards, and hold less than 1/3 MOA at 300-500-600. The heavier the bullet, the longer it takes to settle down. Does it take hundreds of yards? Nope but the heavies can take 100-150 yards to get there. Quote HistoryOriginally Posted By F224:
Originally Posted By chocolateisyummy2:
Bullets going to sleep is just a myth. Bryan Litz test it in Modern advancements in long range shooting volume 2. It’s called epicyclic swerve but a bullet only needs to travel 15-50 yards to dampen out its initial pitching and yawing motion. Group size grows proportional with range. Two experienced shooters, same results. Call it what you will, I call it bullets going to sleep. |
|
|
|
|
Posted: 10/10/2017 5:21:04 AM EDT
[#25]
Quote HistoryOriginally Posted By PR361:
I spent a Summer shooting 200 grain bullets out of a friends .300 Ultra Mag Sendero that he loaned me for an elk hunt. It consistently shot better groups (MOA wise) at 200 & 300 than it did at 100. Two experienced shooters, same results. Call it what you will, I call it bullets going to sleep. |
|
|
|
|
Posted: 10/10/2017 4:18:28 PM EDT
[#26]
Quote HistoryOriginally Posted By popnfresh:
That is because you were aiming more carefully or scope parallax had less error at longer ranges. Quote HistoryOriginally Posted By popnfresh:
Originally Posted By PR361:
I spent a Summer shooting 200 grain bullets out of a friends .300 Ultra Mag Sendero that he loaned me for an elk hunt. It consistently shot better groups (MOA wise) at 200 & 300 than it did at 100. Two experienced shooters, same results. Call it what you will, I call it bullets going to sleep. |
|
|
|
|
Posted: 10/11/2017 10:20:13 AM EDT
[#27]
I took my 300NM and 6.5C out to WY this past week while I was out hunting. Both shot extremely well and had accurate shots out to 900 yards.
|
|
|
|
|
Posted: 10/11/2017 10:53:23 PM EDT
[#28]
Quote HistoryOriginally Posted By 40xb:
I took my 300NM and 6.5C out to WY this past week while I was out hunting. Both shot extremely well and had accurate shots out to 900 yards. |
|
|
|
|
Posted: 10/12/2017 10:13:56 AM EDT
[#29]
Quote HistoryOriginally Posted By jefflebowski:
I was there too, hope you enjoyed my home state! Got a thread on your experience there?
|
|
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
