I have a brux on my 7-08 and couldn't be happier . It's stupid fast shoots good and cleans up easy even running the barns ttsx copper thru it.
At this point I'm convinced it doesn't matter. Buy the one you can get the soonest for the least money and get shooting
It would be worth a phone call to Ace and ask them. I'm sure you would get a very detailed answer to that question. I'm also thinking you may not need quite that fast of twist. I am running 75gr ELDM's thru a 8 twist and it works great, even tho Hornady says they require a 7 twist.I have a Brux barrel on my 260AI and am currently having another chambered for my 257 Wby with a 7.5 twist.
I don't have an ACE barrel yet but am looking at them for a 22-250AI (rebarrel) or 22CM (to replace the 22-250AI. I see they offer 4 groove and 6 groove barrel and my question is, I'm thinking of going to a 6.5 twist for whichever above I go with. Currently my 22-250AI is shooting the 90 grain A-Tip at just over 3300fps in a 25" barrel; it is a Bartlein 5R 7 twist barrel. My calculation show that to have a bullet RPM of 339,428. So far I haven't seen evidence of bullets coming apart. I also plan to try 88 grain ELDMs. Quickload predicts they will run around 3350.
Assuming that the ACE barrel runs similar velocities (it will be 1" longer) that has RPMs approaching 365,500 rpm or even higher with the ELDM.
So which would be easier on jackets, 4 groove or 6 groove? I've always run 5R rifling because allegedly they are less stressful on thin bullet jackets.
Any thoughts?
I plugged the data into JBM and I'm right at 1.5 at my elevation @ 59°F.It would be worth a phone call to Ace and ask them. I'm sure you would get a very detailed answer to that question. I'm also thinking you may not need quite that fast of twist. I am running 75gr ELDM's thru a 8 twist and it works great, even tho Hornady says they require a 7 twist.
I plugged the data into JBM and I'm right at 1.5 at my elevation @ 59°F.
Any colder than that and it drops into the 1.3 range.
Berger shows marginal stability under same conditions shooting their 90 grain VLD.
I don't get much opportunity at Coyotes or other varmints. I'll be looking to use this for whitetail and below sized animals. I want to maximize stability for live game terminal performance. Sometimes they may shoot great groups on paper but do funky things when an animal is shot.If I input the info for my setup into JBM it gives me 1.303 @ 59 degrees. If I drop the temp to 10 degrees JBM shows 1.180
That being said, targets and coyotes show me that everything is fine.
Look at my opening post and then go to post #63 on page 5. Temps were around 37 for the target pics and the video was at 26 degrees.
I jumped on the 22 Creedmoor bandwagon
About 4 years ago I bought 600 pieces of Alpha SP 22 Creedmoor brass, Whidden dies and a reamer. A couple years before that I had gotten a Defiance Deviant Elite action off a prize table. Never used any of it.....until the day before yesterday. I got a 8 twist barrel blank from Ace Barrels to...www.longrangehunting.com