JandB150 Posted June 11, 2013 Share Posted June 11, 2013 Well it seems like there are mixed reviews around on shooting 150gr pills outta 300 blk out, just my luck I have about 400 rounds of the Sierra HPBT that i would like to use for paper ammo.. does anyone have any load data for IMR4227,IMR4198 or maybe even Unique? Im not sure but I think somewhere Ive seen or seen mentioned that ppl have used Unique..Im looking to go with IMR4227 bc I originally purchased the powder for my 44 mag and Ive had issues with it leaving unburnt powder behind, since then I have gotten to the bottom of that issue, but i Have LOTS of IMR4227 and would love to use it up on my blk out ammo..thanks for the help. Link to comment Share on other sites More sharing options...
sociab Posted June 3, 2014 Share Posted June 3, 2014 I also use 147/150 gr. FMJ for my paper 300 Blk loads. I got a chance to crono my 150 loads this past weekend. This is what I used, which should be well in "safe" zones from books and published data. I am looking to try a bit hotter when I get out next weekend. 150 Hornady SST - IMR 4227 @ 16.8 gr. Data from 10 shot group - Hi -1814; Low -1792; Avg - 1799; Ex Sp - 22; StDev - 8 Shot well, cycled well, good groups at 100 yd., no signs of pressure. I hope 4227 with bulk 150 gr will be my standard paper load as the 147/150 gr bullets can be found in bulk at good prices. I suspect this is quite conservative and have made some 10 round trials moving up to 18.4 in increments. Will publish data when I've had a chance to crono. FYI - I'm using H110 for my 110 gr and 125 gr loads with very good results. I believe, testing will prove it out, that the 4227 is better for the 150 gr. loads. I tried IMR 4198 with the 150 gr bullets and was not impressed so far. Maybe this is better for heavy loads going subsonic, but that's not for me. Link to comment Share on other sites More sharing options...
sociab Posted June 9, 2014 Share Posted June 9, 2014 BTW - my data was on a Daniel Defense - 16" with a 1 in 8 twist. Sorry I didn't include that with the data. Link to comment Share on other sites More sharing options...
rjacobs Posted June 9, 2014 Share Posted June 9, 2014 Lil-Gun is my go to powder for the 147/150g FMJBT's. 16g worked best out of my gun(9" 1/7 twist AAC). Link to comment Share on other sites More sharing options...
bmiller Posted June 13, 2014 Share Posted June 13, 2014 +1 on the Lil gun Link to comment Share on other sites More sharing options...
gunther Posted December 17, 2014 Share Posted December 17, 2014 16in. AAC 150gr FMJBT oal 2.150 17.0 gr. LilGun. Avg 2048 fps Link to comment Share on other sites More sharing options...
tcoz Posted December 17, 2014 Share Posted December 17, 2014 Lyman AR Reloading Handbook shows 15.5gr starting load and 17.0+ max load with OAL 2.075 for IMR4227 and Hornady 150gr FMJBT bullet. Link to comment Share on other sites More sharing options...
littlehendrick Posted January 1, 2015 Share Posted January 1, 2015 I run mid range book loads from Accurate for their 5744 load data. I use the 147/150gr bullet pulls for plinking around. It makes it way cheaper than the nice 110gr stuff or subsonic stuff (which is awesome, but at 50 cents a round...ouch!). Haven't crono'ed the load yet. I am running it out of a 9" AAC factory upper. Unfortunately I haven't ran any of the powders you have. I used lil' gun for some 110 gr stuff, and it ran great. I use the 5744 because I found it in stock, and I have shot everything from 110 gr to 220 gr subsonics all with the same powder. Is it ideal? No, but it works. Link to comment Share on other sites More sharing options...
djeffers Posted January 6, 2015 Share Posted January 6, 2015 Well, I eventually want to try the 175gr SMK with 5744 as it supposedly makes major. I loaded 17.5gr IMR 4227 w/ 150gr SMK @ 2.105 COL. I haven't shot or chornoed them yet. Sierra data lists this as a max load and also the most accurate load (assuming H227 & IMR 4227 are the same powder). Sierra lists velocity @ 1950 w/ the above load. Hodgdon's web site lists 17.8g IMR 4227 as max with a COL of 2.235 (this length didn't work for me as not enough neck tension even with Lee FCD). The website also lists velocity @ 1908. I was able to print off load data for 300 Blk from websites of the following companies: Western Powders (accurate) VihtaVuori Hodgdon Nosler Sierra Barnes Hornady has some data, but you have to buy their book. I think Norma has a load listed in their book also, but I was also looking up load data for 7.62x39 at the same time. You can also try 300blktalk.com under their hand-loading section and they have a bunch of info there. But, I try to verify or double check that info. Link to comment Share on other sites More sharing options...
Carlos Posted July 27, 2015 Share Posted July 27, 2015 Are there many people successfully shooting Major with 300BLK? I know that Daniel Horner pulled it off once a few years back - but anyone since then? BTW, I tried loading 147grn FMJs (surplus M-80 bullets) with Lil Gun and at 16.2 grns, there were horrible ejector swipes. Barrel is a 16" Wilson Combat SS barrel with a Carbine length port. I've seen others go as high as 17 grns - but that's way too hot for my particular barrel. Link to comment Share on other sites More sharing options...
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