Finally, a good bullet for my 300 BO AR!
Today I had much success with my AR in 300 Blackout. I got a new mould from NOE, the 311-152-SP. This is a clone of the Lyman 311414, nose diameter is around .302 so PC is good to go! I shot them naked and PC'ed with a starting load of 4227 and got velocities in the 1730's to 1750's with low standard deviations and the PC bullets showed about 20fps higher than the conventional lubed. It was cold and snowing, and I have not figured out how to shoot the darn thing off of a rest well yet. My groups were in the 1.5" range at 50 yards, but with bad shots removed the groups were around .5 to .75" They were more than stable in a 1:8 barrel, no keyholes or other nasty stuff!
I had one FTF in a D&H mag that has given me troubles with 300 BO on the last round and the other mag was a PMAG and it was perfect. The bullets are not getting beat up feeding either. I think I will ladder with 4227, Lil' Gun and maybe commercial H110. This bullet can be seated to the end of the front driving band with the gas check right at the end of the neck, really like that as well. Seems to be about the perfect bullet dimensionaly for the 300 BO. The bullets are not perfect as poured, but that is another topic, but they were good enough for a 22 degree day and test firing.
https://farm5.staticflickr.com/4809/...0084157da8.jpg300bo2 by Matt Ward, on Flickr
https://farm5.staticflickr.com/4905/...bbafcafac7.jpg300bo4 by Matt Ward, on Flickr
https://farm8.staticflickr.com/7846/...d7f4123b96.jpg300bo1 by Matt Ward, on Flickr
https://farm8.staticflickr.com/7873/...a81982df19.jpg300bo3 by Matt Ward, on Flickr