For those who shoot 300 Blackout.....(I do not).....
I have a 270 Max, based on the 357 Max necked down to .277. It has a larger capacity than a 300 Blackout, but bullets are limited to about 140 grain with conventional twist. I have successfully shot it in Production and Standing with 115-140 bullets, as well as a separate barrel in US with 140 bullets.
Conventional 300 Blackout ammo is 110-125 grain bullets. US shooters typically use 155-200 grain bullets. My question is for the former....when running 125-135 bullets, do you have trouble taking rams? I have a chance to rig up a 14" barrel with or without a hi-rise, and looking for direction. I have an ample supply of bullets 110-135 grain, as well as a lot of 30 cal 150 grain, but few bullets at 175+grains. How important is it to shoot heavy bullets on rams?? My 270 max will take rams with 140 bullets and 20 grains of 2015 powder.
Thanks in advance.
Rich
300 Blackout loads for Big Bore
- aggshooter
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300 Blackout loads for Big Bore
Rich Hawkins
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"Go ahead and shoot. The bullet has to go somewhere."
George Hawkins 1917-2000
#29087
IHMSA VP
"Go ahead and shoot. The bullet has to go somewhere."
George Hawkins 1917-2000
Re: 300 Blackout loads for Big Bore
I was using Remington 120 grain bucket 300 blackout for a while BUT if I didn't hit them just right they would not go down. This was out of a 8" barrel. With your longer barrel I think you will be fine. I would not go lighter than 120 grains for a bullet. I tried 147 grain factory ammo but my gun did not like the heavier bullet at all. Pick a load that shoots 2150 fps out of a rifle and you will be good to go.
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Re: 300 Blackout loads for Big Bore
I have owned (2) 300 Whisper (300 AAC B/O) guns, a 10" factory Contender barrel and a 14 7/8" Lilja-barreled XP-100. I used Hornady 150 SP 13.5 296 in the TC, and used a Sierra 180 SBT - 13.0 296 in the XP. Both loads were supersonic, and I never lost a hit ram with either configuration
IHMSA # 13794 Joined May, 1980
Match Director Ascension Silhouette Gonzales, LA 1991-2009
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Match Director Ascension Silhouette Gonzales, LA 1991-2009
Louisiana IHMSA Deputy State Director 1983 - 1985
Louisiana IHMSA State Director 1995 - 2007, 2014 -
IHMSA Region 2 Director 2007 - 2009
Life Member - NRA
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Re: 300 Blackout loads for Big Bore
Rich, I use the 135 grain in my 14 7/8 inch xp-100. I have never lost a ram I hit with it. My loads are suersonic and they hit hard. It used to be my go to gun, but I ran into some super soft Hornady brass and it shoved the cartridge forward into the chamber and had a miss fire. When I pulled the bolt back the bullet stuck in the throat and I had powder all in the action, but this was a brass problem.
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NRA Endowment Member
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IHMSA PC Coordinator(present)
IHMSA VP (past)
IHMSA President (past)
32 degree Scottish Rite
3rd. deg. Master Mason