One day a guy at the club blew out the guts of his brand spank'n new Pro with a 12ga slug. I don't know who but someone a few benches away quipped , "He should shoot two more for group".I was at a gun club once and a guy a couple of benches down put a .308 round right through the brains of his new chrono..
That is to be expected, I've notice considerable differences in published data vs. actually field data over the years. If you can get another chrono. (or two is even better) from a buddy or two and compare the readings from the different machines using the same load, this will give you an idea of the degree of accuracy of your chrono.shot about 20 rounds out of the.32 today with an average of 1767 fps. high was 1777 and low was 1761. the book says "1940", not sure about that difference??
Does you published data give barrel length and if so is it the same length as your barrel ?I actually do have chronograph info for my other .32 from my friends chrony brand a couple years ago that match what I am getting (1776 fps.). 173 fps. in the flintlock world is quite a difference, I think. I will have to play with powder charges just to see what kind of load it would take to get up to their numbers. sounds like a good weekend project, more shooting :grin2:
I have a new/never fired crockett here, but really hate to shoot it ( I would rather sell it). in the "real world", it really doesn't matter. the gain for trajectory ect. isn't much of a difference, very minimal. more of a "why" thing I guess?It would be interesting to shoot that load out of a 26" barrel over your chrono. and see what the results are. I wonder if the ball is reaching maximum velocity while still several inches inside the barrel and the last several inches of barrel are slowing it down a bit. A larger charge may indeed help.