Posted: 10/22/2014 7:52:26 PM EDT
| Whats a good barrel to get to replace my current barrel? Im looking for a barrel capable of 800-900 yard shots. I typically use 150g fmjbt but im trying to reload a better heavier load. Kreiger seems to be popular. I hear 5r barrels are suppose to be better than regular? Can anyone help out? also can someone explain how twist matches with bullet grains? |
|
Your current barrel is fine. 150gr FMJ is not the best for accuracy. Try some 168gr match bullets (AMAX, BTHP etc). Might even give 175gr match bullets a try. Sure, there are better barrels out there, but at least try different ammo and see what your rifle is capable of first. Your going to spend some good money putting on a new barrel. If you do, you might as well get the action trued. It can easily cost $1000 more just picking out a new barrel and having a gunsmith do his work. What scope? |
|
Quoted:
Your current barrel is fine. 150gr FMJ is not the best for accuracy.Try some 168gr match bullets (AMAX, BTHP etc). Might even give 175gr match bullets a try. Sure, there are better barrels out there, but at least try different ammo and see what your rifle is capable of first. Your going to spend some good money putting on a new barrel. If you do, you might as well get the action trued. It can easily cost $1000 more just picking out a new barrel and having a gunsmith do his work. What scope? I would have to agree with dangerdan, shoot the barrel you have now. Use quality match ammunition, and try to take a precision rifle class as well. You will learn a lot more from a class than you will reading the forums. Not saying you cannot learn from the forums, because I do every time I log on. Hands on experience from experienced trainers will generally be the best route to knowledge and skill. |
|
Quoted: Ok I've ran bout 650-700 rounds through it but only with fmjbt. ill try heavier amax bullets. my groups are 6inches scattered typically from bullseye at 700 yards. Are you saying your groups are around 6" at 700 yards? Or 6" from the outer ring of the bull? 6" group at 700 yards is pretty good. That's less than 1 MOA |
|
Quoted:
Are you saying your groups are around 6" at 700 yards? Or 6" from the outer ring of the bull? 6" group at 700 yards is pretty good. That's less than 1 MOA Quoted:
Quoted:
Ok I've ran bout 650-700 rounds through it but only with fmjbt. ill try heavier amax bullets. my groups are 6inches scattered typically from bullseye at 700 yards. Are you saying your groups are around 6" at 700 yards? Or 6" from the outer ring of the bull? 6" group at 700 yards is pretty good. That's less than 1 MOA yea if you're shooting a 6" group at 700yds you're doing fine.... if it's 6" from the bull (12+" group) then it's still not horrible - some good ammo should tighten that up a bit how does it shoot at 1-500? |
|
I shoot to 1000 with my SPS tac. factory barrel.
175smks are the minimum I would consider for long range(to 1000). Doubt you would get the speed out of 155s with a 20" bbl. 230gr Berger hybrid tacticals are the supreme bullet for a short bbled long range .308 with a 1:10 twist, you will need 1:9 twist for the hybrid targets. For best result with your current barrel Berger 185 OTMs are your best bet. Basically the longer the bullet is the tighter the twist rate needs to be to stabilize it. Think of a football, if you don't spin it when you throw it it will wobble. A 1:12 twist will rotate the bullet one full turn per 12inches.A 1:8 twist will rotate the bullet one turn in 8inches so the 1:8 is said to be tighter or more twist. Too much twist and bullet imperfections will be magnified and cause groups to open up. This depend on the extent of the imbalance a the MV and twist. So you don't want more twist than needed to stabilize your chosen bullet. Posted Via AR15.Com Mobile |
|
900 yards calls for something other than a) joe-random bullets, b) 168 SMKs; it calls for High BC bullets!
what you need is either c) one of the high BC 155s {Lapu Scenar, Berger 155.5 FB, 155 Hybrid, SMK (2156 not 2155), and a few others) OR d) one of the high BC heavies (175 SMK is a favorite) You need to determine a loading that will hold better than 1 MoA out through the distance you have to shoot. Properly loaded, a 155 (Scenar) will go 1200 yards (1300 yards with some altitude help). Properly loaded, a 175 (SMK) will go 1125 yards. Start with Federal Gold Medal Match 175, then try some Berger Bullets loaded Ammo, and some Black Hills red box 175 Match. |
|
Quoted:
230gr Berger Hybrids are the tits in .300 WM. Makes .338 LM shooters cry a little on the inside 
Did some pressure testing at the range today with the 230gr Hyb Target out of my 20" SPS .308(12twist  ), I got 2340fps out of them with no pressure problems. That puts all other weights to shame, nothing else can beat it out of the same barrel length.
This increases the hit probability on a 100% IDPA silhouette at 1000yards(7mph w from 3:00) by 15.5% over a 175smk traveling @2650fps and even 2.3% over a 155scener traveling @3100fps 175smk next to my 230hyb targ(3.225 OAL) 
|
|
Quoted:
Did some pressure testing at the range today with the 230gr Hyb Target out of my 20" SPS .308(12twist ), I got 2340fps out of them with no pressure problems. That puts all other weights to shame, nothing else can beat it out of the same barrel length.
This increases the hit probability on a 100% IDPA silhouette at 1000yards(7mph w from 3:00) by 15.5% over a 175smk traveling @2650fps and even 2.3% over a 155scener traveling @3100fps 175smk next to my 230hyb targ(3.225 OAL) http://i3.photobucket.com/albums/y59/glock2027/CIMG1955_zpsba9a6454.jpg Quoted:
Quoted:
230gr Berger Hybrids are the tits in .300 WM. Makes .338 LM shooters cry a little on the inside
Did some pressure testing at the range today with the 230gr Hyb Target out of my 20" SPS .308(12twist ), I got 2340fps out of them with no pressure problems. That puts all other weights to shame, nothing else can beat it out of the same barrel length.
This increases the hit probability on a 100% IDPA silhouette at 1000yards(7mph w from 3:00) by 15.5% over a 175smk traveling @2650fps and even 2.3% over a 155scener traveling @3100fps 175smk next to my 230hyb targ(3.225 OAL) http://i3.photobucket.com/albums/y59/glock2027/CIMG1955_zpsba9a6454.jpg WOW, that picture is worth a thousand words 
Single loading those fatties obviously... are you jumping or jamming? At what distance are they going transonic? See the '308 data' thread for my 190 grain load. That's my go-to for 1000 yards, supersonic the whole way (just barely) out of a 24" barrel What is your 175 grain load, if you don't mind me asking? |
|
Quoted:
WOW, that picture is worth a thousand words
Single loading those fatties obviously... are you jumping or jamming? At what distance are they going transonic? See the '308 data' thread for my 190 grain load. That's my go-to for 1000 yards, supersonic the whole way (just barely) out of a 24" barrel What is your 175 grain load, if you don't mind me asking? Quoted:
Quoted:
Quoted:
230gr Berger Hybrids are the tits in .300 WM. Makes .338 LM shooters cry a little on the inside
Did some pressure testing at the range today with the 230gr Hyb Target out of my 20" SPS .308(12twist ), I got 2340fps out of them with no pressure problems. That puts all other weights to shame, nothing else can beat it out of the same barrel length.
This increases the hit probability on a 100% IDPA silhouette at 1000yards(7mph w from 3:00) by 15.5% over a 175smk traveling @2650fps and even 2.3% over a 155scener traveling @3100fps 175smk next to my 230hyb targ(3.225 OAL) http://i3.photobucket.com/albums/y59/glock2027/CIMG1955_zpsba9a6454.jpg WOW, that picture is worth a thousand words
Single loading those fatties obviously... are you jumping or jamming? At what distance are they going transonic? See the '308 data' thread for my 190 grain load. That's my go-to for 1000 yards, supersonic the whole way (just barely) out of a 24" barrel What is your 175 grain load, if you don't mind me asking? I am still jumping have .050" to go to the lands. My 175 is 45gr of W748 2.840"mag length(around 2600fps), the 230s were 43gr of W748 that were in the 2300s. They will still be above the speed of sound at 1300 yards(depending on atmospherics). For 1000yards I used 185 Juggernauts(41.8gr AA2230 mag length @2585fps) with good luck. My 1000yard range has closed so I have not been able to try but have a Berger 210 LRBT T(non vld, .626/.320 BC) that averages around 2500fps with 45.8gr of w748(3.100 OAL) and seems to stabilize out of the 12 twist. It would be good for long range but the 230 will be better.......If I can stabilize it. These 230s do not stabilize out of my 12 twist barrel, I have a 10 twist Bartlein here waiting which should stabilize the 230gr, I just wanted MVs out of this barrel to compare to the. new barrel(whenever this one goes) |