2500 HD wrote:200 gr. XPB with 42,43,44 gr lil gun. One each looking for pressure. Produced 2741,2851,2869 fps. No signs of pressure.
Ken-
Thanks for your report.
Please continue to post information about your results with different bullets and powder. We locked-breech 450B users need more data points. Some more information on the handloads as you develop them will be most helpful. Primer? C.O.A.L.? Crimping techniques? Case mfr?
A couple of questions about your rifle, if you don't mind? I can't find the answers in what you've posted so far, but I certainly could have overlooked them.
What's the final weight on your rifle?
What is the muzzle diameter on your barrel? I cannot tell from the photo whether the barrel contour is a straight taper from breech to muzzle or something else. If straight taper, what's the breech diameter?
You've produced a fine looking rifle, and one that is apparently fine performing also.
--Bob