6 PRC reloading

[406Backwoods]

I have an extra 6 Creed barrel that I wanna get punched out to a PRC. It’s a 7 twist though and 26” which worries me that a lot of bullets won’t make it to the target. Anyone have words of encouragement?

 

[LostWapiti]

I have an extra 6 Creed barrel that I wanna get punched out to a PRC. It’s a 7 twist though and 26” which worries me that a lot of bullets won’t make it to the target. Anyone have words of encouragement?

I would not do it. You will be around 330,000 RPM. It might be okay but also very likely not. That 6 Creed must be already getting great speed out of a 26”. With your RPMs already exceeding 300k so that’s already marginal and would scare me, especially suppressed.

I know it’s what you already have but there’s no reason I know of that anybody should ever be running a 7 twist 6mm. 7.5-8 is the sweet spot and you even see in the Hornady manual that they use a test barrel for 6creed has 7.7 twist.

 

[406Backwoods]

I would not do it. You will be around 330,000 RPM. It might be okay but also very likely not. That 6 Creed must be already getting great speed out of a 26”. With your RPMs already exceeding 300k so that’s already marginal and would scare me, especially suppressed.

I know it’s what you already have but there’s no reason I know of that anybody should ever be running a 7 twist 6mm. 7.5-8 is the sweet spot and you even see in the Hornady manual that they use a test barrel for 6creed has 7.7 twist.

Unfortunately 7 twist was my only option with the barrel. Haven’t had any issues yet but the added velocity of the PRC makes me wonder what bullets would survive the journey. Monos aside

 

[2buffalo]

I have 300 rounds through a 7 twist with 6 PRC with no issues. Shooting 109 ELDM.

 

[Foster_65]

I think .180 is still where you’ll want to be. Let’s give an example that .200 would be optimum for it. So you chamber it that way. Then the gun doesn’t like that bullet. Almost everything else you’d shoot out of it would be seated kinda too far out of the case, or jumping a long ways. .180 is just a really good spot.

Schmo,
Wondering where you landed on load dev and what speeds your seeing with the 18?

 

[Schmo]

Schmo,
Wondering where you landed on load dev and what speeds your seeing with the 18?

Load dev isn’t “complete” lol. However, with 4831SC (which leaves velocity on the table), I am running the 108 ELD and 112MB right at 3,050 fps out of my 18”. My barrel doesn’t care for the 112MB too much. Using a better powder, 3100 fps is absolutely doable, maybe 3150.