300 PRC
- Thread starter ThaBull
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Cushion909
Well-Known Member
A 1:10" twist is the standard for 300 PRC, designed to stabilize the long, heavy 200+ grain bullets it's famous for. The 178gr ELD-X is a relatively short, light bullet for this cartridge.
dfanonymous
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I don't think the twist is your problem, if your groups are at 100y.
The only down side to using a 10 twist is not have optimum stability on longer bullets that one may want to use for BC benefits and stability through transonic.
Groups can be hard to diagnose from the other side of the internet.
It could be you.
A hardware problem, like loose scope mounts or action screws.
Since you're handloading your own ammo, it could be something in your process with that.
Something that people get wrong on the ELDs is the seating depth.
Could just be a bad shooting rifle, common with production rifles.
Could be a combination of things.
Who knows.
The only down side to using a 10 twist is not have optimum stability on longer bullets that one may want to use for BC benefits and stability through transonic.
Groups can be hard to diagnose from the other side of the internet.
It could be you.
A hardware problem, like loose scope mounts or action screws.
Since you're handloading your own ammo, it could be something in your process with that.
Something that people get wrong on the ELDs is the seating depth.
Could just be a bad shooting rifle, common with production rifles.
Could be a combination of things.
Who knows.
Almost all factory 300 PRCs have 1:9 and the ones that don't have 1:8 for the heaviest bullets. With 1:10 the max bullet weight would be 190-200gr. The 1:8 twist Christiansen Arms 300 PRC Ridgeline I used to own, shot the 245 grain Berger and the 250 gr Hornady A-Tip really well. However, I think a 1:9 twist is just about all you would need for heavy and light bullets.
adk hunter
Well-Known Member
Listening to the rifle is always the sortest course to finish line...
I just got a new 300 prc and sighted in with Hornady eldm factory ammo and it's better than that, check out of the gun and shoot a box of peasant ammo through it
lancetkenyon
Well-Known Member
Surprised the 300PRC has a 1:10".
The 1:10" is plenty for bullet weights from 150 to 215gr. Look at what a .300WM can do with the 1:10".
So I don't think the twist rate is your problem. There are way too many variables to say WHAT the issue is, but the twist rate is NOT the issue.
The 1:10" is plenty for bullet weights from 150 to 215gr. Look at what a .300WM can do with the 1:10".
So I don't think the twist rate is your problem. There are way too many variables to say WHAT the issue is, but the twist rate is NOT the issue.
I tried 208 gr and bullets must have been tumbling cause they was tearing the target the stuff I've read 1:10 twist better for lighter bullets they use 1:8 twist for the heavier ones
jseandsje
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Berger 210 requires 11 twist. Unless your 208?is a very long mono, twist is not your problem.
You better check and make sure they didn't sneak a 12 twist in that barrel
As has been said, twist is not your problem…here are the specs for the .308 178 ELD-X straight from the Hornady website. Most bullet manufacturers will list twist rate info on their website.
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What is your COAL to the lands with the 178?
Kmccord
Well-Known Member
Not sure what all you have tried, but have you done a seating depth test? Your rifle may not like the bullet choice, how does factory ammo shoot?
