Hello to all. I am new to this forum so I guess I should introduce my self before I start asking questions. My name is Wayne and I live in Lagrange Ga. USA. I am a gun collector and shooter. I own several British single shots and a couple of double rifles and like most of you probable have more guns than I can use. I won't go as fare as saying that I am not an addict. Now for my first question. I am getting ready to build a 577 double rifle and I have been unable to find any twist rates for the Bpe guns. So any one with info on bullet lenths and weights along with twist rates and rifling depth would be of help. This is my first time on the forum so I will see if I can figure out how to work the search function. Thanks in advance for any help.