Maximum velocities of 9mm FMJ projectiles before jacket/core separation?

[mmcu]

I think there may be a difference between muzzle velocity range and the question of what velocity will the jacket and core potentially separate. The 750-1300 number in the manual may be more of a reference to typical velocities in published 380 loads, but I will reply to Hornady with this info and see if their answer changes.

I'm sure that you'll sort this out.

If it were me, I'd simply put together some test loads, shoot them into the media of your choice and get the answer myself.

 

[Dale264]

I've shot the 0.355" 124gr FMJs from Everglades Ammo out of my 350 legend at 2500fps+. These are just your typical 9mm jacketed projectile and I've had no issues with them. Very accurate out to 100yd.

9mm 124gr FMJ Bullets

9mm 124gr FMJ Bullets. True jacketed bullets not plated. Made in the USA.

www.evergladesammo.com

 

[Timmis2]

I'm sure that you'll sort this out.

If it were me, I'd simply put together some test loads, shoot them into the media of your choice and get the answer myself.

yeah, paper might even provide an answer.

 

[Timmis2]

I've shot the 0.355" 124gr FMJs from Everglades Ammo out of my 350 legend at 2500fps+. These are just your typical 9mm jacketed projectile and I've had no issues with them. Very accurate out to 100yd.

9mm 124gr FMJ Bullets

9mm 124gr FMJ Bullets. True jacketed bullets not plated. Made in the USA.

www.evergladesammo.com

There is hope!

 

[Oso]

Nobody has suggested in this thread to go above and beyond maximum published loads to achieve higher velocity. If you are referring to the "reddit guy" mentioned above who hit 2170 FPS in his AR9 with the 56gr ARX projectile, he used published data and worked up to the maximum powder charge and recorded his velocity (7.3 grains CFE Pistol) using a slightly shorter/lighter projectile (the 56gr Inceptor ARX vs the 65gr Inceptor ARX). In theory, he probably could have increased the powder charge a little and still remained close to 33,000 PSI if the seating depths remained the same since the 56gr is 8% lighter than the 65gr. If you know anything about the Inceptor ARX 56 and 65 grain, they are identical in profile other than the 56gr is .09" shorter in bullet length.

My apologies... I misunderstood the question you posed of "What is the max velocity of 9mm before core / jacket separation?" to imply that you were interested in determining how hard you could push / max-out velocity in your PCC.

 

[GotRDid]

I've shot the 0.355" 124gr FMJs from Everglades Ammo out of my 350 legend at 2500fps+. These are just your typical 9mm jacketed projectile and I've had no issues with them. Very accurate out to 100yd.

9mm 124gr FMJ Bullets

9mm 124gr FMJ Bullets. True jacketed bullets not plated. Made in the USA.

www.evergladesammo.com

 

[tommeboy]

I have shot the 90gr hp out of my 350L over 2000fps. Would not go through a single milk jug of water. Second jug was untouched. First just about disintegrated.

I have shot my 9mm ar9 with a 16" barrel to 1400fps with a 135gr powder coated lead bullet from a MP mold. It was fairly accurate but I was having case head problems. Now I just shoot them with 4gr titegroup out of a 8" barreled ar9. It does just fine.

If you do try to hot rod this, get a buffer at least 9oz or more. The heavier the better.