75gr Hornaday A-Max

[USMCM16A2]

Gents,


Any of you folks use the 75gr A-max in your AR15 build ups?. I am tempted to use it, I bought 600 of them. But using it in a LC 06 case, with 21 grains of Varget, and trying to keep it under 2.26 OAL is proving to be a difffcult proposition. Because the bullet is very long, and the powder is being compressed, at the previously mentioned 21 grain charge of Varget. Any opinions would be greatly appreciated. Thanks, USMCM16A2

[jkasandiego]

75gr. Amax won't fit you're AR's mag.You'll load this manually one at a time.

[thmpr]

If you want to use it, need a single fed mag. Sinclair sells it.

[kj]

I think the A-Max is not desisned to be mag fed. It's a long bullet - maybe a VLD. Most people I know single load them in an AR. Depending on your chamber, you could probably get ~24 grains of Varget if you seat the bullet ten thousandths off the lands (not mag length).

[jandmtv]

anyone know if the nosler 77grain custom competition bullets can be mag fed in a AR?

[jkasandiego]

anyone know if the nosler 77grain custom competition bullets can be mag fed in a AR?

yes.

[jandmtv]

ok thanx! now i feel alot better, because i jumped the gun and ordered 1000 of them from midway. and it had not occurred to me that it may not fit in a ar mag. im glad it does.

anyone know what the recommended OAL is for the nosler 77gr? nosler gives load data on their site, but it doesnt list the OAL

[ocabj]

anyone know what the recommended OAL is for the nosler 77gr? nosler gives load data on their site, but it doesnt list the OAL

2.260" is considered the top end of magazine length. I seat the 77gr Noslers or Sierras to 2.255". That gives enough leeway for any meplat variance that may send it above 2.265" which could cause an issue during my rapid fire string (dragging tip in the magazine).

[ocabj]

As far as the 75gr A-Max, I bought 1,800 (3x600ct boxes) at the end of December for slow fire standing practice ammo. The price is cheaper than my Nosler 77s.

Started using them a couple weeks ago.

[bruce_ventura]

I think the A-Max is not desisned to be mag fed. It's a long bullet - maybe a VLD. Most people I know single load them in an AR. Depending on your chamber, you could probably get ~24 grains of Varget if you seat the bullet ten thousandths off the lands (not mag length).

kj is talking about using an OAL gauge like the one from Hornady to measure the chamber, and then a bullet comparator to seat the bullet precisely. If you don't know what all this means, don't try to wing it. You could end up with a slam-fire or out-of-battery fire - very, very dangerous.

[kj]

kj is talking about using an OAL gauge like the one from Hornady to measure the chamber, and then a bullet comparator to seat the bullet precisely. If you don't know what all this means, don't try to wing it. You could end up with a slam-fire or out-of-battery fire - very, very dangerous.

I seat my 80 grain SMK twenty thousandths off the lands. I take my measurements using a Stoney Point OAL gauge and comparator.

Some people do seat bullets into the lands - normally VLDs as some of them don't like to jump. The closer you seat to the lands, the higher the pressure.

If you want to use the 75 grain A-Maxs, seat them longer (after you have taken the appropriate measurements) and single load them. If you want your ammo to load from the mag, there are a number of 75-77 grain bullets available that are designed to be magazine fed.