bet sub sonic combo for 500 yards ?

[375rifleman]

Hello, everyone I don't know why I was trying to reinvent the wheel with a new 50 caliber subsonic rifle cartridge when the 50 Alaskan has been around for many years. There are subsonic loadings for the 50 Alaskan, except there aren't very many bolt action rifles that would be compatible with the 50 Alaskan as its a rimmed cartridge.

 

[ATH]

Subsonic to 500 yards? The wind is going to play hell with ALL of them.

 

[375rifleman]

You're right ATH at extended ranges the wind will affect any subsonic cartridge, however the heavier and more aerodynamic or higher ballistic coefficient the bullet is like say a 750gr Hornaday A-Max with a G1 BC of 1.050, or 800gr Barnes Solid Bore Rider with a G1 BC of 1.095 the affect would be somewhat reduced. Although the impact should still hit like a sledgehammer.

375rifleman

 

[Bravo 4]

Standard environmental conditions & 10 mph full value wind, 750 grain Amax with 1000 fps input:

 

[JJMoody]

Don't know why that looks as fun as it does

Standard environmental conditions & 10 mph full value wind, 750 grain Amax with 1000 fps input:

 

[Schnyd112]

Hello, everyone I don't know why I was trying to reinvent the wheel with a new 50 caliber subsonic rifle cartridge when the 50 Alaskan has been around for many years. There are subsonic loadings for the 50 Alaskan, except there aren't very many bolt action rifles that would be compatible with the 50 Alaskan as its a rimmed cartridge.

If those ballistics are what you are looking for, check this one out. Smaller than the 50 Alaskan but looks like @Joel Russo has it figured out in a bolt gun. Not positive that you could get it subsonic but I recon you could get pretty close.

https://www.longrangehunting.com/threads/straight-wall-midwest-hammer.196601/#post-1402626

 

[TXAoudadKlr]

I've seeb video of a 458 socom pushing some heavy Lehigh out to 500 deer. Appears effective if you know what you're doing. I believe that set up was for population control.

 

[TXAoudadKlr]

Biggest thing is finding something that has bullets designed for sub sonic use.

 

[CA48]

Check out this guys videos he is shooting Leigh 570gr sub sonic fracturing projectiles.

 

[4xforfun]

If I ever pull the trigger on a suppressor i am going to chamber up a 338BR (6BR necked up) and shoot the 300's

 

[jda2631]

500 freight train was made for exactly this purpose. http://wyattsoutdoor.com/product_info.php/cPath/22/products_id/89

 

[375rifleman]

I was thinking that a 16.5" barreled TC Encore chambered for the subsonic 50 Alaskan would be what I am looking for. However I don't know if a 1 in 15 inch twist rate or a 1 in 20 inch twist rate would be better. I would appreciate any and all thoughts, opinions, or answers in answering this question.

Regards,
375rifleman

 

[MudRunner2005]

Don't know much about .50 calibers, but I do know a little about subsonics and stability, that when in doubt, always go with the faster twist. For example, most .300 BLK rifles are 1:8 twist, because they were designed to shoot subsonic ammo. So the extra twist helps stabilize the bigger heavier bullets at the slower muzzle velocities.

 

[NEMTHunter]

Don't know much about .50 calibers, but I do know a little about subsonics and stability, that when in doubt, always go with the faster twist. For example, most .300 BLK rifles are 1:8 twist, because they were designed to shoot subsonic ammo. So the extra twist helps stabilize the bigger heavier bullets at the slower muzzle velocities.

300 AAC Blackout with a 185-200gr bullet might work alright out to that distance.

I think you nailed the round for the OP. If all he wants to do is shoot steel the .300 AAC is the way to go imho. It would be way cheaper to shoot then any of the .50 cals

OP if you use Flatlines 198 Grain pill in the .300 AAC @1000fps it only has 2.85 MOA drift @500 yards with a full value 10mph wind. And from 100 yard zero it takes 71 MOA to hit dead on. This is 70 degrees and sea level.