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StraightShooter
06-15-2008, 1:11 PM
Hey guys, i am about to order a reamer from pacific tool and gauge and i was wondering if you could give me some opinions. I will be chambering it in .243 win and will be using the 115gr dtac's. I am planning on going with a bartlein barrel in 7.5 twist. Is there any reason to go with a 7 or 8 twist instead. Seems like a 7.5 is the inbetween twist from what I see most people using. Also, does anyone here load the dtac's? How do you load them? Seated into the lands or with a certain amount of freebore? What about seating depth? I have a badger dbm so should I measure the magazine and load them back around 200 thousandths under magazine length so I can chase the lands as the throat wears?

Sorry for all the questions but im just trying to get my ducks in a row before I order the reamer. Thanks.

Cypriss32
06-15-2008, 1:48 PM
Use 7.5 from GA precision and ROCK barrels recomdendations.
Why dont you just hvae GAP barrel you us a B/A, its only 350.00. The reamer is gona be ALmost the same with go and no gages.

StraightShooter
06-15-2008, 2:07 PM
Use 7.5 from GA precision and ROCK barrels recomdendations.
Why dont you just hvae GAP barrel you us a B/A, its only 350.00. The reamer is gona be ALmost the same with go and no gages.

Because im barreling the rifle myself and want the reamer for future rebarrels and setbacks. :D I think ill call PT&G tomorrow and see what drawings they have on file regarding what I want. They could probably tell me what other people have gone with also.

ar15barrels
06-15-2008, 5:41 PM
Go with a throat that will let you seat the bullets to within 0.1" or less of the magazine length when the bullet is seated into the lands.
Re-check seating length every 100 rounds.
Chase the throat.
This should give you about 300 rounds between setbacks before you run out of magazine length.
Mill a hex on the muzzle so you can unscrew the barrel with a socket and ratchet.
Setup extra barrels the same way and you have a switch-barrel gun.
The barrel does not need to be torqued in all that hard.
Benchrest shooters sometimes swap barrels with only hand pressure.

Cypriss32
06-15-2008, 6:02 PM
That barrel will last longer then you think. I hear of 2500 plus rounds....

ar15barrels
06-15-2008, 6:57 PM
That barrel will last longer then you think. I hear of 2500 plus rounds....

On a 7.5 twist with dtacs?
I don't think so.

Cypriss32
06-15-2008, 7:09 PM
I do....... Do i need to push back the frontier of ignorance..... Spend some time on snipers hide.
specific member to talk to is Rob01 and one of Gaps smiths. Give him a call and you will be shocked.....

rksimple
06-15-2008, 8:17 PM
Call George and ask him about it. He's answered a bunch of quite detailed questions re: chambering (for 243 and 7wsm) for me. He's pretty helpful. Just let him know its for personal use and you're not his competition.

StraightShooter
06-16-2008, 10:47 AM
Mill a hex on the muzzle so you can unscrew the barrel with a socket and ratchet.


That sounds interesting. I have never seen that before but it sounds pretty cool. I just might do it.



Just let him know its for personal use and you're not his competition.

Ha Ha, i dont think he has anything to worry about, at least for a long time.