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Posted: 10/31/2014 7:14:52 PM EDT
[#1]
I did mine last week. I've been hooked on the cartridge ever since! Congrats man and continue having fun!
ETA Pics: 
175SMK Pulls LC Brass (From Exhile Machine) 15.3gn IMR 4227 Federal Primers |
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Posted: 10/31/2014 7:52:07 PM EDT
[#2]
I'd try the H110 for supersonic loads. Note that Hodgdon's use of the Interbond bullet shows an overall length too long for the 150 fmj-bt Hornady. Check the 2nd post in this discussion:
http://www.300blktalk.com/forum/viewtopic.php?f=141&t=84361 I think you'll have more reliable feeding from AR mags from 2.065-2.80". Whatever brass you use make sure the neck diameter with a seated bullet is less than .334". |
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Posted: 10/31/2014 10:33:21 PM EDT
[#3]
Quoted: I've got some 1680, and H110. Will be loading some 150gr Hornady bullets. I've got the brass cleaned, sized, and trimmed (1.365), just ready for load workup. Any suggestions as to which of those 2 powders would be easier to work with for a first time .300blk guy? Will be shooting it out of my 8.2" Noveske SBR. I also don't have any reloading manuals that have .300blk in them. I'll be getting some, but for now, will be just using Accurate's, and Hodgdon's website for data. I now never use H-110 on any bullet heaver than 135 grs in this cartridge. I now use Lil'gun. So A-1680 would be my choice with the powders you have mentioned. You can't get enough A-1680 into the case with this bullet to have pressure problems. So expect compressed charges with A-1680. (why I went to Lil'gun) |
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Posted: 11/1/2014 8:24:27 PM EDT
[#4]
Well, I changed plans a bit, used 155gr Sierra HPBT bullets. Seated them to 2.190" with 18.6gr of 1680.
They appear to not fit that great in the magazine - probably something to do with what RG1 posted. I'm still slightly confused on the issue - how can I ensure whatever bullet I'm loading will work correctly? From what I can gather, the issue is not seating the bullet enough, or too long COAL? Looking at the link RG1 provided, it lists a sierra palma 155gr @ 2.150", but thats for the Palma's. |
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Posted: 11/1/2014 10:14:25 PM EDT
[#5]
How to determine the proper seating depth; Measure the bullet ogive with a caliper and mark with a Sharpie where bullet measures .250. You want that mark on the middle of the magazine bump. Part of my first post in this thread, http://www.ar15.com/forums/t_6_42/385765_300_Blackout_Master_Thread.html
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Posted: 11/1/2014 10:54:06 PM EDT
[#6]
Worked like a champ, thanks Dryflash.
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Posted: 11/2/2014 1:07:07 AM EDT
[#7]
Quote HistoryQuoted: Worked like a champ, thanks Dryflash.  |
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