1. The amount of pressure to put on the bullet is just enough to seat it. You dont want to upset the nose. You are not shooting a RB.
2. Do you weight your bullets? I try to find what the average bullet weights, then do plus or minus .5 grains from there.
3. You mention trying to shoot onion skin, but you use butcher paper. Are you doing your double wrap with onion skin?
4. I like sizing my bullets. I have 3 or 4 different sizing dies that I try on my bullets. I cast my bullets from the best molds that I can have made for me. My bullets are not exactly all the same size when I get done casting and wrapping them. A slightly tighter bullet will shoot higher.
5. Do you weight your powder to within 1/10th of a grain?
6. I only shoot swiss 2F in a rifle like this.
6. play with the wads. Try no card, card/wool felt comb. Also try a poly card. Poly cards have worked very well in my rifles, however I quit using them since they can not be used in the world matches.
7. I tried 5 or 6 different papers before I found one that worked really well. People have quite a bit of success with the paper that Buffalo Arms sells. Dave Gullo is the owner, one heck of a good long range shooter and a friend of mine. If he sells it there is a good chance that he uses or would use it.
8. Use a platinum lined nipple, if you dont have one, change out your nipple fairly often. Check the flash hole for erosion.
9. Might try a grease groove bullet. I have rifles that do not like the GG bullet, and rifles that like the PP bullets better. I have both and shoot both. It is up to the rifle.
10. I use a fairly damp patch, with a little scrubbing at the bottom, followed by a dry patch. I have for years snapped a cap after cleaning between shots. I am experimenting with not snapping a cap each time and using a brush wrapped with my cleaning patches instead of a jag.
11. Play with how much tin is in the bullets. One rifle I use 1 pound of tin to 16 pounds of lead, different rifle I use 1 in 25.
Those are the things that I would do if I was trying to wring more accuracy out of that barrel. Time and money is all it is.
1" group at 100 yards is certainly not bad, and it just might be as good as the barrel can shoot and perhaps you as well.
Fleener