Ball and patch size

[32chevy vett]

What ball and patch size would you recommend for a green mountain 45 cal. barrel.

 

[ZUG]

Start with a .440" ball and .015" lubed patch and see how it does with one powder amount and type. If you don't get the accuracy you want try increasing the patch thickness - if that don't work change ball diameter to .445" and start with the .015" patch thickness - if that don't work change the powder amount and start over - if that don't work try different lube and start over -- you get the picture? Good luck.

 

[hanshi]

If you're asking about patch measurement a patch about 1 & 1/16" to 1 & 1/8" dia. That works for either a .440" or .445" ball. And yes, for thickness do start at .015".

 

[32chevy vett]

My last rifle had a Douglas Barrel that I used a .445 ball with a .015 patch. But did not know if the Green Mountain barrel performed better with a different combination.

 

[SDSmlf]

You talking about a GM round ball barrel or a LRH?

 

[Grimord]

My GM 45 barrel with 1:66 twist likes a .440 ball with a .016 mink oil lubed patch over 55 grains of goex 3f for 1.25" groups at 50 yards.

 

[rja72]

All the guys I know use a .451 in a GM.

 

[32chevy vett]

That sounds like a good starting point thats the same barrel I have. Just waiting for the brown to take and then its ready to shoot.
I know you have play with them to get the right combination.
Just wanted to thank all of you for your in put.