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808 Posts
Really enjoy my 458 SOCOMs and considering a 375 SOCOM but cartridge specific bolts and drop to ten round magazine capacity bother me a bit. Already have a couple 375 AR 15 cartridges but one is straight wall (not a fan) then other forces use of a really opened up bolt face. Have looked at case dimensions while considering case availability and what I already have in my pile.
Looking at the 22 Nosler it appears you could blow out body taper just a few thousandths from case head forward, cut it basically right at rear of case neck and then neck down to 375. Should retain 25 round capacity in 6.8/22 Nosler magazines, allow use of existing 325 to 400 grain 375 subsonic projectiles all contained in a standard 5.56 bolt face.
From idea to working cartridge is a lot of work but a heavy hitting subsonic AR 15 cartridge allowing use of 300 to 400 grain bullets, high case capacity and 5.56 bolt seems to me a fine idea. Still recovering at home and all my CAD software is on work computers plus still don't feel up to sitting at a computer. Just working out an idea as best I can in my head and on tablet when feel up to it. There are some fine wildcats taking advantage of the 22 Nosler case but seen none that have gone really fat and short for a subsonic thumper.
Anyone have a 375 AR 15 cartridge they are using. If so, which one and why did you dive in? 375 SOCOM would be easy as all work is done but brass cost is horrible and then cost of proprietary bolts have learned with 458 SOCOM cost to play is steep. I want that 400 grain bullet with high magazine capacity using relatively inexpensive brass to form cases. Would be a better people thumper than 458 if keep case capacity up in the 20 to 23 round range opposed to ten but still be a pig popper with 400 grain bullets.
Not reloaded in a year due to brain fog from all the medications and could not sit on anything harder than my Lazy Boy recliner for more than an hour due to the prostate cancer, infections and treatments/surgeries making sitting difficult. Need at least a mental exercise to start getting back in the game. Noticed a 22 Nosler case in the bowl I dump pocket change, live rounds, empty cases and other odd pocket items in till sorted and moved where live. Been sitting in my recliner with a dial caliper measuring, getting specifics on 375 commercial bullets and making rough notes. Should not be long before there are 10,000 wildcats for the AR 15.
Looking at the 22 Nosler it appears you could blow out body taper just a few thousandths from case head forward, cut it basically right at rear of case neck and then neck down to 375. Should retain 25 round capacity in 6.8/22 Nosler magazines, allow use of existing 325 to 400 grain 375 subsonic projectiles all contained in a standard 5.56 bolt face.
From idea to working cartridge is a lot of work but a heavy hitting subsonic AR 15 cartridge allowing use of 300 to 400 grain bullets, high case capacity and 5.56 bolt seems to me a fine idea. Still recovering at home and all my CAD software is on work computers plus still don't feel up to sitting at a computer. Just working out an idea as best I can in my head and on tablet when feel up to it. There are some fine wildcats taking advantage of the 22 Nosler case but seen none that have gone really fat and short for a subsonic thumper.
Anyone have a 375 AR 15 cartridge they are using. If so, which one and why did you dive in? 375 SOCOM would be easy as all work is done but brass cost is horrible and then cost of proprietary bolts have learned with 458 SOCOM cost to play is steep. I want that 400 grain bullet with high magazine capacity using relatively inexpensive brass to form cases. Would be a better people thumper than 458 if keep case capacity up in the 20 to 23 round range opposed to ten but still be a pig popper with 400 grain bullets.
Not reloaded in a year due to brain fog from all the medications and could not sit on anything harder than my Lazy Boy recliner for more than an hour due to the prostate cancer, infections and treatments/surgeries making sitting difficult. Need at least a mental exercise to start getting back in the game. Noticed a 22 Nosler case in the bowl I dump pocket change, live rounds, empty cases and other odd pocket items in till sorted and moved where live. Been sitting in my recliner with a dial caliper measuring, getting specifics on 375 commercial bullets and making rough notes. Should not be long before there are 10,000 wildcats for the AR 15.
