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.308 SBR Hand Loading Strelok 12/28/2023 (Thu) 21:33:48 No. 7262
So recently I got a .308 bolt gun for my birthday and I want to SBR it to 12" and thread it for a suppressor, thinking about form 1'ing my own suppressor too since i've got the knowledge and tools to do that. Anyways, i know SBR .308s have a bad rap for being flashy and concussive and i'd like to minimize that as much as possible, especially if i go the route of a form 1'd suppressor, and since i'm getting into reloading i'd figure i'd try to cook up some handloads that are optimized for the shorter barrel length to reduce flash and the concussive force. Any suggestions on where i should start or personal experiences? Or should i just get rid of the gun and buy a 7.62x39?
>>7262 My initial reaction was "Why?", but that was soon defeated by "Why not?", so I got out a reloading manual. I would go heavy for caliber, 200 or more grains in .30 cal., and use slow burning powder. Sierra has data for .308win in single shot pistols using a 14" test barrel, that's probably a good place to start. The hottest load is 38.5 grains of H4895 pushing a 200 grain bullet to 2100 fps. I've read that you can get more complete powder burn in short barrels by switching to magnum primers. I experimented some with WLRM primers and 45-70 in a Marlin guide gun but I didn't get very consistent results, it seemed to expand the velocity spread out in an upward direction. I was having issues with the consistency of my crimping at the time so it might be worth revisiting.
>>7263 Thanks for the reply, i'm new to this so this will probably be stupid questions but what's the significance of the heavier bullet and slower powder? Wouldnt a slower burning powder produce more flash and bang? Or does the slower burn allow you to use less powder while still achieving good ballistics?
>>7264 If you are using a suppressor staying sub-sonic makes it significantly quieter and a heavier bullet will have more energy than a lighter one at a the same velocity. The slower burning powder is necessary with heavier bullets to prevent dangerous pressure spikes. It takes longer to start a heavy bullet traveling down the barrel and if you use too fast of a powder it can make too much gas for the area behind the bullet possibly causing a very bad day. You definitely should get some reloading manuals if you haven't already, looking up recipes online isn't good enough. I recommend the Hornady manual for basic reloading processes and the Sierra manual for a detailed explanation of interior and exterior ballistics. This should probably go in the existing hand loading thread, I thought it got slid off the board by the nigger lover but it's still there.
>>7265 Ah ok, that makes more sense. I've got a Hornady reloading manual and actually just browsed the .308 section earlier today which had some similar loads and data. I'll probably end up compiling a list of loads from this thread and then test them out over time along with my own experiments, ill make sure to post any results back here.


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