Hey Duffman I purchased a GPR Right hand percussion last year and it is by far the most accurate roundball rifle I own. I carried it for 5 days last year on my deer hunt. I came up empty handed. Never saw any animals, but I was ready. I use open sights and it groups approx. 2 inches at 100 yds. for me. With more practice I'm sure it will be better. I think you have made an excellent choice. I'm using 75 -80 gr. of Pyrodex P with a .015 patch and a .530 roundball. This is one excellent rifle.

Midsouth has just a couple left at $360.33. Here's a link. http://www.midsouthshooterssupply.com/item.asp?sku=000156031126

Good luck on whatever you decide