A post of mine in another thread:
I found load data for 110gn projectiles and thought I would try using 30 carb bullets. The load data was for IMR4227. The highest charge in my ladder load, 20gn, was not high enough. Primers were all still well rounded, velocity was just over 2000fps. Accuracy was not good. That load was nowhere near being compressed, so I may work up a few more with higher charges, or try a different powder.
I found load data using 4227 that goes up much higher in charge, so I am going to give this another shot at some point. I have a whole bunch of 30 carb bullets to work with.
My test loads with Hornady 130sp and H335 powder gave me good results. I want to work a little more on this, and also try a couple more powders with this projectile.
We had a gun show this past weekend and I was able to pick up a pound each of RL7 and 1680. I also picked up some Hornady 150gn SP and RN bullets to try.
One of the first things I do is to figure out a good working COL. For the SP bullet that is pretty simple, it is what will fit in the mag which is about 2.220". The Ruger Mini 30 has a really long leade and none of the bullets I've tried have come anywhere near touching the rifling when seated to max length.
However, for the RN 150, I had hoped that seating it long would put it closer to the lands, but I ran into an issue with feeding. At the max length the RN would tend to catch on the barrel chamber, causing bullet setback. Seating it further back improved feeding, I eventually ended up seating to the cannelure and using a firm crimp.
Another problem I found was poor concentricity when seating the RN bullet. Discovered this was an issue with the Lee seating die. The seating stem centers well for spire point bullets, but for RN bullets that contact the seating stem down towards the bottom, there is a lot of play in the seating stem that causes it not to be centered. I fixed that, though, but cutting about 1/8" ring off the end of a 380 case and forcing it onto the seating stem. That small brass ring took up the loose play in the die. Yes, there is that much play in the Lee die.
Now I just need to work up some more test loads and find a time to make it back out to the range.