Quote:
Originally Posted by Pyrex
I'm looking to build my first .300 here soon. I'm going to be building a midlength AR-15 in .300 whisper or fireball.
One of the things that I'm still a little confused about is forming the cases. Now, I understand you can buy a die set when essentially does forms the case. However, it seems SSK recommends to form from .221 - which for me doesn't make much sense - because the whole appeal of the cartridge is the cheapness - I can use .223 cases and .308 surplus projectiles - best of both worlds. I just want to straighten out that I CAN use .223 brass to form the .300 cases?
Also, as far as gas blocks, everyone recommends an adjustible gas block for the large and smaller projectiles and pressures. If I were to just install a basic gas block on a 16" .300 whisper barrel with a pistol gas block location, I would presume it would probably be best for subsonic rounds - would that be right? What's a reasonable but effective adjustable block you might recommend?
Thanks for everyone's time, I really appreciate it.
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paladin's gas block, TP555 on here, you can buy brass from hoser on here cheap also. The chamber will work with 223 but I wouldnt reccomend a ssk upper since you can get the same quality for cheaper on here from spook or tp555 or other vendors on the net. You should b ok with super and subs with a pistol position 16" upper but you may have to play with handloads some to find the right combo.
If I were doing this over then this is personally what I would do.
Side charging upper/carrier "mega machine upper the bcg they reccomend also"
yhm ff tube "works with tp555's block if i am correct"
spooks barrel threaded 5/8x24 tpi
magpul 20 round mags.
heavy buffer
upper should run around $550 minus the barrel and block since their prices to machine are dependent on material cost at that time. You can also get a 300 blackout barrel and use the same brass/data as the whisper.
The reason I say the side charging upper is that you can cut the gas off and use it simmilar to a bolt action which is the cats ass when suppressed fyi.
Just my personal opinion and 2 cents free of charge
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