Re-Barreling a Shilo

[DirtySteve]

Don, My bullet is in the 1.4" realm. With a 45-70 I think to shoot the best a faster twist is needed due to the slower speeds. I know 18 can get it done but, I am always looking to get it done better. lol. I think under stabilization is a bigger concern than under. A faster spin actually increase the bullets BC so it will fly even better. Brian Litz (The Chief Ballistician for Berger Bullets ) has a set off books out call Applied Ballistics (Also has a company by the same name). The books are very informative and he carries out tests to prove or disprove "what we know". He uses a Savage rifle with multiple barrels from both the same and different manufactures, varying twist rates. Really in depth testing. He ever tests chronographs. News flash on that one. Anyone of the current Laradar, Magnetospeed and Ohlers(sp?) are so close the difference is in consequential. His personal Chonograph has a ten foot sky screen spacing for the best/most accurate readings. Most of his stuff applies to the passing fad powders (smokeless), but some of the info does cross over to our stuff.

Kurt, We had been using pure lead bullets until recently. He read Perry's book and came to agree with me that some tin should be added. We are now using 1-16 which he found easier to get the weight spot on with. I told him it would have a more consistent flow of metal, plus it is nicer to cast. Congrats on the new rifle, a CPA is on my things to do list.

Steve D.