Try and cover all reply's so far, it has a 24" barrel, By REDNECK Measuring the twist is a TOSS UP, it is falling close to 1/11 but that is with running a patch down the barrel and measuring a full turn, so It could and should be a 1/10, The data I got from the HODGDON site only gives Hodgdon powders, I like them , but also run alot of IMR, WIN, and Reloader,, If you look at the Hodgdon data and compare it to the 6mm International, there is a good difference, 1000yardstar, do you have an powder charge wt from your gun, I Love the way it feels and looks, Just need to get it to shoot, starting blind with it is a problem, this gun was made between 2001 and 2004, that is the time frame, holland and Lawson had it in their confines, it was made up for Antelope hunting
Thanks for all ya'lls help maybe this information will help out