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View Full Version : 300 blackout cast data / Or can i load cast bullets using starting jacketed data?


MAGA
10-08-2017, 09:58 PM
I have been searching for 300 blackout data using cast bullets, results are spotty. Most of the data I have found is for jacketed bullets.

I am actually looking for some bolt gun data, rifle and pistol powder.

The bullet i have is about 130gr the mold is a 311410 MP


Can i safely substitute and load cast bullets using jacketed data starting loads? I would never approach max loads....
waco
10-08-2017, 10:16 PM
The short answer is yes.
MAGA
10-08-2017, 10:28 PM
The short answer is yes.

Thanks, I have done this before when loading pistol but never tried it with rifle

So thought i'd ask lol
Boolit_Head
10-08-2017, 11:01 PM
Check out 300blktalk.com there should be a lot of cast data over there as well.
runfiverun
10-08-2017, 11:22 PM
for a 130gr bullet 32-20 data would be completely acceptable also.
MAGA
10-09-2017, 04:56 PM
for a 130gr bullet 32-20 data would be completely acceptable also.

Ok cool, didn't know that!
Aunegl
10-12-2017, 05:39 PM
In my 300 blk AR pistol-10.5", I've been doing some load developments with my 30 cal. cast bullets. I've been using the 130 gr. RCBS-sp. My best load so far, 18 gr. - 1680, LC brass, Fed. 205, 1.93" OAL. At 100 yd. - 2.5 moa with 5 shots. BHO with the last shot. This load moves to the bonus round. 200m rams.
bigolsmokebomb
10-12-2017, 11:41 PM
good to hear on that load. I just got done building a 16in ar and ive been looking for a good load for supersonic cast boolits. so far all ive been casting for is heavy subsonics but ill be getting a lighter weight mold pretty soon.
gunoholic
10-23-2017, 03:51 AM
I just tried 17gns of ADI Ar2205 under my Mihec 311410 (with the big hollow point) it was doing an average of 1870 fps from a 10.5" barrel, fed well, Lrbho, accuracy was something like 3/4" for 10 rounds at 25 yards but I was shooing for function and chrony not accuracy. The boolits were seated just past the grease groove.
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Grmps
10-24-2017, 04:55 AM
https://www.egglestonmunitions.com/load-data.html

300 Blackout (Subsonic)

https://i.imgur.com/Ox6cMey.png