7-6.5 Prc barrel preference?

[Hoekight]

Building my first dedicated magnum competition rifle. Pretty new to the midrange f-class stuff and since I’ve started I’ve improved drastically with my 6br. I made High Master a couple of months ago and actually won my first club match this past Saturday. But… i really want a magnum. So I’m diving on the 7-6.5 Prc wagon.

So I’ve been collecting parts since I made up my mind to do it. I’ve got a Remington 40x action and a magnum bolt to fit it. I have a stock I bought from the classifieds here and a jewell trigger. I ordered Cortina’s reamer from Manson which should be here in the middle of May sometime. Now my question is I can get a Bartlein 31” straight in 9 twist or a Brux 32” straight in 8.5 twist today without wait time. Which would better suit the need or will there be much difference? I plan on shooting 180 hybrids.

I’m only shooting club matches for a hobby. I have my nephew and some teens from the church I pastor starting to join me now and they are loving starting in the competitive shooting with me. Also another reason I’m trying to free up my 6br for them to shoot.
Any ideas or thoughts would be appreciated. Thanks.
Dwayne

 

[SKWERLZ]

Either barrel works
I’d prefer the 8.5 twist and have seen what 7mm Brux barrels are capable of.

 

[dthomas]

Both will be fine. Check bugholes for a barrel. It will be quicker than ordering from the manufacturer.

 

[LVLAaron]

If you can get a brux right now, do it.

 

[SKWERLZ]

If you can get a brux right now, do it.

good advice

 

[FeMan]

Both are great and as said, either will work fine. One consideration is finished weight. I am not sure about the contours/weight of each option but you will be very close to weight if they are straight 1.25s. If they have a taper to 1" or so at the muzzle you shouldn't have to sweat it.

 

[JLT]

I'm partial to Brux, and I'd go with a 1:8.5. That will stabilize a 190 gr. A-Tip and shoot the 180 gr. Hybrid handsomely.

As for weight, I have a 32" finished length Brux 1.25" straight on my rifle and it's threaded onto a BAT 3LL, which is not a lightweight action. The 40X you plan on using is quite a bit lighter than the 3LL. The barreled action sits in a Cerus XR stock, also not known for lightness. With a March 10-60 on it, my rifle weighs 21 lbs, 2 oz. If I swapped out the March for a Sightron SV, I'd have a problem, but I make weight comfortably with a 32" straight.

 

[EricCu]

Just out of curiosity, what twist rate is best for 1k yards I've been using a Brux 32" 1.25 straight 9 twist. Is it worth it to try a faster twist? I'm new to this and I'm learning.

 

[ELR LVR]

Just out of curiosity, what twist rate is best for 1k yards I've been using a Brux 32" 1.25 straight 9 twist. Is it worth it to try a faster twist? I'm new to this and I'm learning.

You must use math and formulas to calculate the correct twist rate per your bullets "LENGTH:
use this from Berger, they do all the math and you just enter the parameters
Twist is not exclusive to nor relevent to distance
if your bullet is gyroscopically stable, the bullet is stable throughout it's trajectory
I think you may be surprised what twist rate you actually require if you want room to grow
such as trying out the A-tip (1.662" long)
The twist rate calculator should answer your question if you want a faster twist

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Twist Rate Stability Calculator

Our newly updated Twist Rate Stability Calculator not only tells you what your SG is, but it also lets you know if you are reaching your optimized BC.

bergerbullets.com

 

[Willow]

I'd buy both so you have a spare on hand ready to go!

 

[Sandstorm]

My preferred barrel is a Brux 9 twist......its all I shoot...pushing a 180 HYB Berger

 

[FeMan]

Just out of curiosity, what twist rate is best for 1k yards I've been using a Brux 32" 1.25 straight 9 twist. Is it worth it to try a faster twist? I'm new to this and I'm learning.

A 9 twist is favored over a 1:8.5 in my experience with F-Class shooters. It will handle 180s and 184s well. I shoot both 9 and 8.5 and don't really have a personal favorite. I have heard that a stability factor of 1.5 to 1.8 or so is best for extreme accuracy, but I think its very subtle compared to higher twist/stability if there is an edge at all.

The Hornady bullets with their tips require a slightly higher twist than the Berger's of comparable weight. A 9 twist may or may not stabilize these and will depend on your barrel and density altitude.

On my 7mm ELR rifle, I shoot 1:8 to help with stability through transonic flight, but that is well beyond 1,000 yards.

 

[JLT]

Just out of curiosity, what twist rate is best for 1k yards I've been using a Brux 32" 1.25 straight 9 twist. Is it worth it to try a faster twist? I'm new to this and I'm learning.

If you plan on shooting the 180s, you're fine with a 1:9. The 183 Sierra will be a roll of the dice, but a 180 Hybrid, 180 VLD, 180 Scenar L, etc., will be fine.

 

[EricCu]

Thank you all for the feedback. I forgot to mention I'm running 180 hybrids and 184.

 

[dthomas]

A 9 twist is enough for berger 180 and 184's.