311414 for the 300 blackout and others

Thanks Excess.  I do have a chrony and plan on evaluating that as well if accuracy meets standards.  The Harris tapered nose design theoretically should have the accuracy edge since it self-guides into the rifling.  That said, theories are just that.

I wanted to add another report.  A friend and his wife came over to shoot, and they ran 50 of my loads through their S&W with zero problems.  Up to that point they had been buying factory loads, so only about 40 rounds downrange prior.  They had a ball.  A few loads were fired at dusk to determine how big a fireball the load produced.  Subjectively it was much less than rifle rounds such as .223 or .308, and arguably a reasonable choice for home defense at night.

Based on the fired brass (flattened primers, no other issues) I would say that 15.3 gr H110 was about as warm as I would like to go in their gun.  Subsequent reloading of that brass found no loose primer pockets or other issues.  Anyone wanting to try this load should really start at 15.0 gr or slightly under and test in their gun for function.  This is my opinion only, and you assume all risks etc. etc etc.  When firing this load in my gun, the primers were noticeably less flattened, with rounded edges.

Still no accuracy testing (funds short for suitable scope), but if nothing else this design is the cat’s meow for plinking.  I suspect it is better than that but without data . . .

I finally got a 2 x 7 leupold on my gun and did some testing.  I immediately ran into trouble with some difficulty chambering on occasion.  It appears that my rifle has a very tight throat, so much so that if the nose of the bullet is at all bigger than bore diameter, it causes problems.  I did manage to fire some for group and despite the truly atrocious trigger, sub 2.5″ 3 shot groups at 100 yards were consistently easy to come by, even some I filed a flat nose on.  It’s a good starting point.  I will have to address my barrel issue though.