If you’re at 2.5 to 3 MOA, you don’t need filler you need more powder.
KW
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If you’re at 2.5 to 3 MOA, you don’t need filler you need more powder.
KW
"The OP Wrote: "My Pedersoli Sharps .45-70 seems to like 62g of OE 3f under a BACO Money bullet. That leaves a decent amount of case left to fill"
I agree Kenny.
First question is, How do you know your rifle seems to like this load - have you been shooting this load?
The second question is, what accuracy does your current 62 grain produce?
I am not trying to be hard on you but I think you are going about this the hard way. You do have some good information about your rifle chamber and bullet, you know how far out of the case to seat the bullet to touch or be very close to the rifling.
My advice is, start with that over-all-length and fill the case up under the bullet with powder, no filler, and then test that and increase the powder charge one or two grains at a time until accuracy gets good and refine the amount of powder from there until you have the most accurate load.
You can play with all the other variables after that. This way you will have a baseline load.
Edit...Appologies..My experience was with Smokeless 44 Mag...I slink away now!!
Freebore is created when the rifle is chambered (not a feature of a cartridge) and on a 45-70 is usually quite short. What I think you are talking about is what is most often called, "jump to lands" and yes, it is set by how deeply you seat the bullet. You are right in thinking you should keep this to a minimum for best accuracy.
Tim