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Feb 12th, 2024
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 Re: .280 Target Impact
[Re: StraitShot]
#8225177
04/04/21 04:48 PM
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Joined: Nov 2005
Posts: 5,306
DLALLDER
THF Trophy Hunter
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THF Trophy Hunter
Joined: Nov 2005
Posts: 5,306 |
I have a 7x57AI that loves the 162 SST with RL-19 or 22, don't remember which. Gun has a 24" Proof Research barrel & I don't have a clue as to twist. Shots will touch @ 100 if the nut behind the trigger works correct. I have tried to measure twist but doesn't work for me, get a different result every time.
Last edited by DLALLDER; 04/04/21 04:49 PM.
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Re: .280 Target Impact
[Re: StraitShot]
#8225191
04/04/21 05:10 PM
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Joined: Oct 2009
Posts: 12,221
wp75169
THF Celebrity
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THF Celebrity
Joined: Oct 2009
Posts: 12,221 |
My proof barrel has the twist stamped on it. Actually it looks laser engraved or something. I can barely see it. It may be under your stock. Doesn’t really matter if it already shoots good though.
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Re: .280 Target Impact
[Re: J.G.]
#8226648
04/06/21 03:00 AM
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Joined: Sep 2010
Posts: 553
StraitShot
OP
Tracker
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OP
Tracker
Joined: Sep 2010
Posts: 553 |
My unsatisfactory experience with the 162 SST was with a 1:9.5 barrel. Been poking around on the internet and there seems to be some consensus that a faster twist is required. I believe Fireman JG is a big fan of this bullet. It might be good to get his input. (No offense, Smokey Bear. I think you have the right answer.) I've loaded a shot a metric ton of 162 A-Max and 162 ELD-X in 7mm-08, 7mm-08 A.I., and .280 A.I. The twists have been 1:8.7, and 1:9. Those twist rates and a 162 just go together. After reading screws tight, barrel free floated, appropriate components, I think the 1:10 twist may be the problem. The only way to (kind of) overcome lack of twist rate is a stout powder charge. That's not a real fix, but it can make things work, if you're staying inside 500 yards. I've also loaded 154 SST in the 1:9 7mm-08 and they stacked inside 1 inch at 300 yards. So, the 6mm and 7mm SST bullets have been made to shoot tight for me. It has been a while since I made this post and was just now able to get back to it.... So to everyone who posted.. I read your notes and thank you.... After checking the screws, base, free float.. etc... all that is left is the 1:10 twist and I can't change that right now. I started down this path because I have been looking at an Aoudad hunt and the outfitter is concerned 7mm-08 or 7X57 might not be enough gun....so I got out my .280.  The 7mm-08 is a Tikka and has a 1:9.5 twist and the 7X57 has a Shilen with 1:9. I have made some test loads for the Mauser and am heading to the range.... they are both "enough gun"... 
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Re: .280 Target Impact
[Re: StraitShot]
#8233674
04/12/21 03:36 PM
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Joined: Jan 2012
Posts: 41
Rutersville
Light Foot
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Light Foot
Joined: Jan 2012
Posts: 41 |
My unsatisfactory experience with the 162 SST was with a 1:9.5 barrel. Been poking around on the internet and there seems to be some consensus that a faster twist is required. I believe Fireman JG is a big fan of this bullet. It might be good to get his input. (No offense, Smokey Bear. I think you have the right answer.) I've loaded a shot a metric ton of 162 A-Max and 162 ELD-X in 7mm-08, 7mm-08 A.I., and .280 A.I. The twists have been 1:8.7, and 1:9. Those twist rates and a 162 just go together. After reading screws tight, barrel free floated, appropriate components, I think the 1:10 twist may be the problem. The only way to (kind of) overcome lack of twist rate is a stout powder charge. That's not a real fix, but it can make things work, if you're staying inside 500 yards. I've also loaded 154 SST in the 1:9 7mm-08 and they stacked inside 1 inch at 300 yards. So, the 6mm and 7mm SST bullets have been made to shoot tight for me. It has been a while since I made this post and was just now able to get back to it.... So to everyone who posted.. I read your notes and thank you.... After checking the screws, base, free float.. etc... all that is left is the 1:10 twist and I can't change that right now. I started down this path because I have been looking at an Aoudad hunt and the outfitter is concerned 7mm-08 or 7X57 might not be enough gun....so I got out my .280. The 7mm-08 is a Tikka and has a 1:9.5 twist and the 7X57 has a Shilen with 1:9. I have made some test loads for the Mauser and am heading to the range.... they are both "enough gun"... Try Reloader 16 Sierra 150 gr SPT Max 52.5gr 2,913 FPS My 280AI loves RL16, and I've dropped 3 bull Elk shooting 140gr. ![[Linked Image]](https://texashuntingforum.com/forum/pics/userpics/2021/04/full-34528-290370-280ai_load_data_sheet.jpg)
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