308 greif. Help/opinions

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308 greif. Help/opinions

Post by Harrynsw » 22 Dec 2018, 5:38 pm

Hi folks
My Browning A bolt dosnt like 150 grain rounds. Have owned the gun for 3 years. Was putting 150 grain corelokts thru it to begin with 4 moa groups @100m. Shortly after switched to 130 grain federal speer which gave me 1 moa groups @ 100m but these round do alot of damage being a hollow point, after 2 and a half years iv tried to go back to a SP that being the Hornady whitetail 150 grain, was only at the 50m range but 1.5 inch groups @50m....
And thoughs/info appreciated
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Re: 308 greif. Help/opinions

Post by marksman » 23 Dec 2018, 2:27 pm

make sure the rifle is clean and try the corelokts again :drinks:
I'm sure you will find the rifle will shoot what it shot before :thumbsup:

just because it shot with one type of 150gr projectile does not mean it will shoot all 150 grainers
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Re: 308 greif. Help/opinions

Post by bigrich » 23 Dec 2018, 2:48 pm

hey harrynsw , i bought a second hand sako a7, and it hated hornady 150sst's did not want to group under 1 1/2 -2" at 100. i tried everything. i thought i'd been dudded got to talking to a fella in a GS who had the same problem with a different brand of rifle, and changed to 165 gn with good results. i did some research and decided speer 165 btsp were the one for me. good expansion for a heavy projectile. so they say. still got to field test that. but it makes one hole at 100 now , shoots better than most people can believe . a factory round that worked well and confirmed the bullet weight theory were the "aussie outback" 308 165 gn sp's these shot around 1" at 100. it might be worth buying a box of these to test the theory . my sako has a 1-11.something twist . twist rate seems to be why my rifle doesn't like 150's. it shot federal 130 gn hp factory ammo ok but hope this helps :drinks: :thumbsup:
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Re: 308 greif. Help/opinions

Post by Harrynsw » 23 Dec 2018, 4:46 pm

marksman wrote:make sure the rifle is clean and try the corelokts again :drinks:
I'm sure you will find the rifle will shoot what it shot before :thumbsup:

just because it shot with one type of 150gr projectile does not mean it will shoot all 150 grainers


Thanks marksman
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Re: 308 greif. Help/opinions

Post by Harrynsw » 23 Dec 2018, 5:01 pm

bigrich wrote:hey harrynsw , i bought a second hand sako a7, and it hated hornady 150sst's did not want to group under 1 1/2 -2" at 100. i tried everything. i thought i'd been dudded got to talking to a fella in a GS who had the same problem with a different brand of rifle, and changed to 165 gn with good results. i did some research and decided speer 165 btsp were the one for me. good expansion for a heavy projectile. so they say. still got to field test that. but it makes one hole at 100 now , shoots better than most people can believe . a factory round that worked well and confirmed the bullet weight theory were the "aussie outback" 308 165 gn sp's these shot around 1" at 100. it might be worth buying a box of these to test the theory . my sako has a 1-11.something twist . twist rate seems to be why my rifle doesn't like 150's. it shot federal 130 gn hp factory ammo ok but hope this helps :drinks: :thumbsup:


Thanks bigrich, you confirmed my thoughts, trying a heavier projectile was my next move.
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Re: 308 greif. Help/opinions

Post by marksman » 23 Dec 2018, 6:39 pm

bigrich wrote:hey harrynsw , i bought a second hand sako a7, and it hated hornady 150sst's did not want to group under 1 1/2 -2" at 100. i tried everything. i thought i'd been dudded got to talking to a fella in a GS who had the same problem with a different brand of rifle, and changed to 165 gn with good results. i did some research and decided speer 165 btsp were the one for me. good expansion for a heavy projectile. so they say. still got to field test that. but it makes one hole at 100 now , shoots better than most people can believe . a factory round that worked well and confirmed the bullet weight theory were the "aussie outback" 308 165 gn sp's these shot around 1" at 100. it might be worth buying a box of these to test the theory . my sako has a 1-11.something twist . twist rate seems to be why my rifle doesn't like 150's. it shot federal 130 gn hp factory ammo ok but hope this helps :drinks: :thumbsup:


and you know bigrich I tried 4 different brands of 165gr projectile in my brno 308 and it would not shoot them but when I tried 150's the groups shrunk to acceptable groups under 1/2 moa, I'm about to try out 130's in it for my daughter to use :drinks:
goes to show the rifle will tell you what it likes being fed :thumbsup:
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Re: 308 greif. Help/opinions

Post by bigrich » 23 Dec 2018, 8:01 pm

when i first got back into this game people were telling me 22lr rifles can be finicky , well , turns out centrefires can be worse ! :D suppose, if it was easy it wouldn't be any fun ! :drinks: :thumbsup:
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Re: 308 greif. Help/opinions

Post by Harrynsw » 23 Dec 2018, 8:05 pm

bigrich wrote:when i first got back into this game people were telling me 22lr rifles can be finicky , well , turns out centrefires can be worse ! :D suppose, if it was easy it wouldn't be any fun ! :drinks: :thumbsup:

So true.
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Re: 308 greif. Help/opinions

Post by JimTom » 23 Dec 2018, 8:57 pm

Mate it’s a bit of trial and error if you’re using factory ammo. I reload and my .308 only likes certain projectiles. A bit tricky if you’re restricted to factory anno.
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Re: 308 greif. Help/opinions

Post by Harrynsw » 23 Dec 2018, 9:24 pm

JimTom wrote:Mate it’s a bit of trial and error if you’re using factory ammo. I reload and my .308 only likes certain projectiles. A bit tricky if you’re restricted to factory anno.

Yep factory ammo. New to the technical side of things.
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Re: 308 greif. Help/opinions

Post by bigrich » 23 Dec 2018, 9:30 pm

try the 165 gn aussie outbacks if you can get them harry
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Re: 308 greif. Help/opinions

Post by SCJ429 » 23 Dec 2018, 9:38 pm

Does it still shoot 130 grain Speers well? But they do too much damage to the game you shoot? So you want to shoot a heavier bullet that has a thicker jacket? If it were me and I was happy with Speer 130s I would go for head or spine shots at close range.
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Re: 308 greif. Help/opinions

Post by marksman » 23 Dec 2018, 9:51 pm

SCJ429 wrote:Does it still shoot 130 grain Speers well? But they do too much damage to the game you shoot? So you want to shoot a heavier bullet that has a thicker jacket? If it were me and I was happy with Speer 130s I would go for head or spine shots at close range.


+1 :thumbsup: :drinks:
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Re: 308 greif. Help/opinions

Post by Harrynsw » 23 Dec 2018, 10:05 pm

bigrich wrote:try the 165 gn aussie outbacks if you can get them harry

Yep I can get those. Will try them.
Thanks
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Re: 308 greif. Help/opinions

Post by Harrynsw » 23 Dec 2018, 10:07 pm

SCJ429 wrote:Does it still shoot 130 grain Speers well? But they do too much damage to the game you shoot? So you want to shoot a heavier bullet that has a thicker jacket? If it were me and I was happy with Speer 130s I would go for head or spine shots at close range.

Forgive me, but don't I need to use a minimum of 150 grain for hunting larger deer in state forests?
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Re: 308 greif. Help/opinions

Post by southeast varmiter » 24 Dec 2018, 8:51 pm

Harrynsw wrote:
SCJ429 wrote:Does it still shoot 130 grain Speers well? But they do too much damage to the game you shoot? So you want to shoot a heavier bullet that has a thicker jacket? If it were me and I was happy with Speer 130s I would go for head or spine shots at close range.

Forgive me, but don't I need to use a minimum of 150 grain for hunting larger deer in state forests?

Min 130 gr .270 cal
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Re: 308 greif. Help/opinions

Post by southeast varmiter » 24 Dec 2018, 8:54 pm

The issue you are having with factory 150’s is jump distance from the lands.
In 308 accuracy is best at around 30 thousands off the lands.
165 hit around 45 from factory 150 believe it or not can be 100 or more.
This jump kills accuracy.

I have bullet pulled factory 150 and re seated them to 30 thou. Group 1/2”.
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Re: 308 greif. Help/opinions

Post by bigfellascott » 24 Dec 2018, 8:59 pm

southeast varmiter wrote:The issue you are having with factory 150’s is jump distance from the lands.
In 308 accuracy is best at around 30 thousands off the lands.
165 hit around 45 from factory 150 believe it or not can be 100 or more.
This jump kills accuracy.

I have bullet pulled factory 150 and re seated them to 30 thou. Group 1/2”.


Nice little tip mate, thanks for sharing. :drinks:
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