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bbs383ci
01-23-2018, 08:37 PM
ok guys, i am a total newbie for casting for rifles. I cast for my pistols but am wanting to try it for my 300blk. I will be powder coating the bullets.

i will be casting sub and super sonics

Is a gas check needed if you are powder coating?

I'm sure i will have more questions later.

Thanks

John McCorkle
01-23-2018, 08:52 PM
Welcome, 300 blk is my favorite caliber to cast for. Not as easy as some/most but it is so economical to load cast in...what are you interested in? I PC and gas check but that may be Overkill. Ever looked up Elvis Ammo on YouTube? He does alot of 300 blk testing with cast and powder coating

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bbs383ci
01-23-2018, 09:49 PM
Welcome, 300 blk is my favorite caliber to cast for. Not as easy as some/most but it is so economical to load cast in...what are you interested in? I PC and gas check but that may be Overkill. Ever looked up Elvis Ammo on YouTube? He does alot of 300 blk testing with cast and powder coating

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i really want to use it for plinking and maybe shooting hogs 75 yards and under. i really like shooting this round.

ill look him up and see what he says. i really don't want to use them but if i have to its still cheaper than jacketed.

BigMagShooter
01-23-2018, 09:59 PM
get a plain base bullet for your blackout, with powder coating you can shoot them fast, without, subsonic won't be an issue.

jimb16
01-23-2018, 10:22 PM
Simply put, a gas check bullet will shoot better with a gas check, but plain base bullets also work well. I shoot both in my 300b.o. and they are PC'ed too.

Joby
01-24-2018, 10:22 AM
I have had great luck with the Lee c312-155-2R powder coated without a gas check in pistol and Carbine length gas systems 1/7 twist 8.5" and 16" barrel length. Over an appropriate charge of Lil Gun. And accuracy is good from 1600 fps to 2350 fps. No leading of barrel or gas system. So here is a start for ya. I'm sure others will chime in.

marek313
01-24-2018, 11:10 AM
I know many people run similar formula here for 300AAC. I also use Lee 312-155-2R PC no GC under 15gr of H110 in PSA upper with 16" 1/8 twist. So much fun for kicking cans around for $0.10/round. My favorite plinking round right now. At least you can tell where these rounds hit not like .223s. Wont be as accurate as FMJ .223 but for new shooters and for just plinking around it doesnt matter.

popper
01-24-2018, 09:06 PM
I'm pushing a PB 145gr to 2100 with accuracy in 18" barrel. Haven't chronied the 170gr PB yet. All PCd.

bbs383ci
01-26-2018, 02:38 PM
Awesome thanks guys. I was looking at that Lee mold last night. I’ll have to get it coming this weekend along with some powder.

Thanks!!!

John McCorkle
01-26-2018, 04:03 PM
I'm pushing a PB 145gr to 2100 with accuracy in 18" barrel. Haven't chronied the 170gr PB yet. All PCd.Where did you find yourself an 18 inch barrel for 300 blk?

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bbs383ci
01-26-2018, 05:13 PM
One more question,

Can I use pure lead if I powder coat or would it be better to cast Lyman #2?

popper
01-26-2018, 05:22 PM
McGowan barrels. 1:10 twist, shoots GREAT. Actually, I sent the upper (slick sided) & BCG and they assembled, H.S.d. As for alloy, 3% Sb for supers. #2 works if that is what you have. Maybe softer for subs.

John McCorkle
01-26-2018, 05:32 PM
McGowan barrels. 1:10 twist, shoots GREAT. Actually, I sent the upper (slick sided) & BCG and they assembled, H.S.d. As for alloy, 3% Sb for supers. #2 works if that is what you have. Maybe softer for subs.I've been interested with a long barrel 300 blk for a long time. Not getting much velocity but you get some...

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marek313
01-29-2018, 09:54 AM
One more question,

Can I use pure lead if I powder coat or would it be better to cast Lyman #2?

Pure will be too soft. Lyman #2 air cooled or anything around 14-16bhn should work.

mto7464
02-02-2018, 11:33 PM
What molds are you guys having good luck with. I have the Lee 235 and its so so. The other lee molds I have don't feel well after PC'ing due to deep seating depth.

John McCorkle
02-03-2018, 12:33 AM
What molds are you guys having good luck with. I have the Lee 235 and its so so. The other lee molds I have don't feel well after PC'ing due to deep seating depth.That Lee 155 2r mold is mustard for 300 blk. Many people report great results when powder coating for 300 blk.

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asmith80
02-03-2018, 12:09 PM
Has anybody tried hitek coated plain based in super? Just wondering if only powder coating protects like a gas check at the higher speeds or if hitek would do a similar job

Drew P
02-04-2018, 10:12 PM
I switched from pc to hitek for everything I shoot and it’s been much easier, faster, and more consistent than my PC was. It’s easy to run into sizing problems if you add too much pc thickness on these long bullets. This is where the hitek “stain” is superior because it ads like .0005 instead of .002-.003.

There are guys pushing over 3200 FPS with hitek, I’ve only pushed it to 2400. No probs no gas port probs.

mto7464
02-10-2018, 12:02 AM
That Lee 155 2r mold is mustard for 300 blk. Many people report great results when powder coating for 300 blk.

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Tried it, can't seat it out far enough to get it to work.

John McCorkle
02-10-2018, 12:08 AM
Tried it, can't seat it out far enough to get it to work.In an AR or bolt/single shot?

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Moonie
02-11-2018, 09:57 PM
Tried it, can't seat it out far enough to get it to work.

What have you tried? I've got a nose sizer from NOE and I've used mold release spray on the nose of the mold to ensure the nose is not oversized after powder coating.

John McCorkle
02-11-2018, 10:05 PM
Tried it, can't seat it out far enough to get it to work.Guess the question should be where are you trying to seat out to? Most seat that bullet to 2.050 and get ragged holes at 100

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bruce drake
02-11-2018, 10:40 PM
The Lyman 311359 casts a 115gr gas-checked spitzer mold that I really enjoy using my 300BLK upper as a supersonic. I have not shot them with PC coating yet because I just started PC coating my bullets and haven't loaded any 300BLK brass with the PC-coated 311359s I covered this weekend.

I also enjoy using the LEE 155gr spirepoint bullet with the 300BLK for plinking out to 200 yards and I've built a load using Lyman's 311413 175gr Squibb Bullet for under 1600fps for short range can popping out to 100 yards.

georgerc
04-12-2018, 07:15 PM
Guess the question should be where are you trying to seat out to? Most seat that bullet to 2.050 and get ragged holes at 100

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how in the world do you accomplish that COL, either I have an awful tight chamber or the rest of them are really loose, that bullet, in my mold at least drops 309 forward of the crimp ( that's about 1.980col ) I tried it, wont even chamber, my freebore/throat is about 308, not to mention it would hit the lands before that even happens, but I shoved some in there and the throat obviously scraped that bullet and sized it down to 308, I took a crude measurement to see how deep that bullet would go in and I came up with 1.900" before it jambs, not sure how those nose sizers work but sure is a lot of work at this point, maybe my mold is a little larger and my chamber a little tight, also noticed some that fed, when I pulled them looked crocked in the cartridge.

not to hijack but it didn't work for me not sure if I want to seat it that deep or if there's anything else I can do with it.