Target shooting. Roundball .440 vs .445

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With a properly fitted patch and same lube will one ball shoot better groups than the other? I will be testing later in the season. Just currious what others have found.
 
A lead ball will expand to fill the grooves. Having to beat the hell out of the ball to get it to seat will leaves marks on the ball that can effect your group. Also if your patch is showing lots of burn and gas leak marks your group will also suffer. Consistency of chamber pressure is very important in good repeatable shooting.
 
The three factors; 1 actual bore size. 2 actual patch thickness and toughness. 3 actual ball size.

With either size ball you should be able to pull a good combination together.
 
What does a shredded patch mean? (Round Ball)
It can mean that the muzzle is rough and loading is damaging the patch and final shredding is happening on the outbound trip.

It might mean that the rifling is sharp and ditto the above.

Could be that the patch is so thin that it's not performing the function of the patch at all.

Could mean the patch material is weak and of low quality. Not performing it's function.

These are all issues that are often addressed with "load development". Varying powder charges, powder type, granulation, patch material, lube, etc. A best result can be found but not necessarily a good one.
 
I'm still kinda new at this, but when I first got my pedersoli kentucky I was shooting .445 with .010 patches. The day came when dry balled ,we all do it, but we we pulled the ball the rifling was dug well into the ball. Went to .440 ball with the same patch. Loaded much easier and group sizes got better.
 
One of the better expenditures one can spend for this hobby is a reasonably good digital vernier caliper. For $25 one can get one that reads US standard and metric. It will measure outside dimensions, inside dimensions, and depth. There's a number of vendors that sell them. Harbor Freight, Midway USA and probably several others. We can measure patch thickness, bore diameter, barrel dimensions, frizzen width, length from the jaw screw to the face of the frizzen, ball diameter and more.
 
A lead ball will expand to fill the grooves.
You want the patch material to fill the grooves and grip the ball. You will see the imprint of the fabric weave on the ball if you pull it after loading where the lands in the bore compressed the patch.
Also if your patch is showing lots of burn and gas leak marks your group will also suffer.
Usually because the patch is too thin and not filling the grooves in the bore.
 
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