Loads for 300blk

[hyrysc]

I recently built a 300 blk with a core15 9.5" barrel (awesome barrel BTW) and have been experimenting on some loads for it.  I am making my own cases by cutting down 223/5.56 brass and I have a crap load of 170 grain 30 cal round lead nose made for a 30-30. 

I read where it wouldn't work on an AR because the round nose would get caught on the feed ramps etc, but I like to test instead of just regurgitating internet folk lore, so I grabbed a couple of pounds of H110 and got to work.

I started quite light (yes, I know the dangers of reduced load H110, but then again, if you don't use your brain, then reloading is probably not for you anyway, so YMMV, use at your own risk, etc etc)

I started off with 8 grains of H110 with an OAL of 2.10.  It fired the bullet all the way through the barrel (no squibs) and ejected the case, but would not lock the bolt back (when experimenting, I ALWAYS) fire one cartridge at a time.

So I increased .5 grains at a time until I hit 11.5 grains.  At this point, I started getting a locked back bolt.  I continued increasing it until I reached 15 grains and will probably stop here.  I have not chrony'ed it yet, but it fires every round, ejects, strips the next one and locks back on the last round and I have no pressure signs or flattened primers.

I am pretty certain that I am still subsonic, but won't know until I can properly chrony it. 

I think that this might be a useful hunting round since the lead nose wouldn't depend as much on velocity for expansion as most of the 308 rounds currently do, so the shorter barrel and reduced speeds of the 300blk should not be an issue.

Anyway, this is my story and just figured that I would share. 

[survivalshop]

I have experimented with 150 gr. exposed lead spear points & they were pretty accurate , but I have a 16" Wilson bbl. & am now getting very good results from Nosler 125 gr. ballistic tips , using H110.

I'm not a fan of any exposed lead ammo in an AR type rifle , because it can shave lead & the possibility of that shaved lead in the chamber , just doesn't sit well with me . Hell, I'm not to crazy about the ballistic tipped stuff.

I have yet to try any of them, 150 or 125 on a Hog yet ,but its on my to do list.

[hyrysc]

Yes, I am with you on that.  Course I keep my stuff pretty clean and maintain it regularly, so if I start seeing much of that, I will close down production on that and move toward the OTM or ballistic tips for hunting and the FMJ's for plinking.