243 or 243 AI

[bigbrad53]

Makes me wonder what the difference in 26 vs 28 barrels with 240 bee? I would of thought that it would burn clean by 26 inches. I mean its not a monster case capacity. But for the reloader or even factory ammo what if any increase would be possible till diminishing returns?

Got a 22 CHeeta with 27" barrel and that thing just screams. You could start long and shortin it if you don't like it. Had 26" 243 back in the day and it was sweet. but never had anything over 95 grs. run through it.

 

[SkipB]

I was going with a 28 with a 1 in 9 twist now yall have me thinking a 26 might be better

 

[ButterBean]

My 2 pennies, In my experience the 243AI doesn't see the velocity gain as other cartridge's do, now with that being said I'd AI it just for the brass life and ease of trimming

 

[bigbrad53]

My 2 pennies, In my experience the 243AI doesn't see the velocity gain as other cartridge's do, now with that being said I'd AI it just for the brass life and ease of trimming

Can't argue with that.

 

[bigbrad53]

I was going with a 28 with a 1 in 9 twist now yall have me thinking a 26 might be better

Start with 28 & take an inch off at a time, then you'll know for sure.

 

[ntsqd]

My 2 pennies, In my experience the 243AI doesn't see the velocity gain as other cartridge's do, now with that being said I'd AI it just for the brass life and ease of trimming

What I said a while back, but much less clear.

 

[gemihur]

It gains 8.1% in velocity by the Ackley design

... at least when using a 100 gr. pill

 

[Rocketeer77]

I`m getting ready to rebarrel my older 243 and I am either going back with a McGowan 243 or 243 AI. Is the Ackley that much better than the standard 243?

6mm Creedmore

 

[gemihur]

Better brass life and more velocity capabilities, why not?

 

[Seabeeken]

Better brass life and more velocity capabilities, why not?

I shoot 243ai, 250ai, 257ai, 7x57ai, 280ai and I think I have trimmed 1 case in years. When fire forming ai the case usually gets shorter which also helps put off trimming.

 

[bigbrad53]

I shoot 243ai, 250ai, 257ai, 7x57ai, 280ai and I think I have trimmed 1 case in years. When fire forming ai the case usually gets shorter which also helps put off trimming.

How do you like the 7X57AI ? Got one on Mauser action I've thought about AIing for years.

 

[Seabeeken]

How do you like the 7X57AI ? Got one on Mauser action I've thought about AIing for years.

I like it Brad. Mine is a rebarreled Ruger 77. Its a tack driver with Hammer bullets. It'll do anything the 280 will do. Its running 101 HH at 3490 fps and 120 HH at 3245 fps as measured by my Labradar.

 

[bigbrad53]

I like it Brad. Mine is a rebarreled Ruger 77. Its a tack driver with Hammer bullets. It'll do anything the 280 will do. Its running 101 HH at 3490 fps and 120 HH at 3245 fps as measured by my Labradar.

Now that's what I wanted to hear. Was shootin a 95 Chilean Mauser over 40+ years ago that thought it was a target rifle. My cousin got me interested in the 7 Mauser back in the day and now he hasn't shot his in years. Always had a soft spot for the old cartridge. Shoots way flater than it should and with modern loads it will kill anything I'm apt to come up on.

 

[Seabeeken]

Now that's what I wanted to hear. Was shootin a 95 Chilean Mauser over 40+ years ago that thought it was a target rifle. My cousin got me interested in the 7 Mauser back in the day and now he hasn't shot his in years. Always had a soft spot for the old cartridge. Shoots way flater than it should and with modern loads it will kill anything I'm apt to come up on.

Got mine from a dealer in SD and it had a long throat and wouldn't shoot very good. It was a rechambered 7 Mauser. I bought a Krieger sporter match grade sporter weight barrel and had Dave Kiff at PTG make me a reamer with a shorter throat. I can send you the reamer print if you wish. I had issues with getting Barnes to shoot under 3/4" and shelved it for a year for other projects. Then I found Hammer bullets! This rifle came alive with Hammers, keeping groups in the .5-.6 area with several powders I tested. I also found PPU brass to be very good brass and priced well. I find it similar to my 284 Win. but will match 284 speeds with less powder, given the same bullet. YMMV