First time casting for rifle:
The boolit is a Lyman #308241 cast from half range scrap / half magnum shot and powder. They come out at .311 / 157 grains and I sized them with a .308 Lee sizer and powder coated / water dropped them after sizing. They're ending up at .3085-.309. I loaded them with 10 grains of Red Dot at a length of 2.510. I decided on this length based on an ancient Ideal manual I have that says what groove they are designed to be seated to. They are going to be shot in a Henry single shot rifle. The load is from the 1980 edition of the Lyman cast boolit manual.
Everything is fine except that I tried tweaking the extractor off the rim and "plunking" them in the chamber. Most of the need a gentle nudge to go the last couple thousands into the chamber. You can open and close the breech on all of them just fine. I ruled out several other things that could be happening, i.e. neck clearance, case length throat size, etc and finally came to the conclusion that the powder coat on the bore sized portion of the bullet is just barely touching the bore.
Question is: Are there negative implications to the bore riding portion of the bullet being a little oversized or is this good?