Originally Posted by geargrinder
True, it requires expensive machinery, but it is in an effort to maximize production not quality.
I pointed out the hammer forging because of the pictures of the Tikka barrel. Hammer forging won't produce something like the Savage barrel picture. Hammer forging has it's own issues as already stated.
The picture of the Savage barrel is a result of button rifling problem. Send it back, or see how it shoots.
the initial machinery buy for a hammer forging operation is actually fairly similar to a button rifled setup when it's all said and done. Good quality gun drills don't come cheap, and it's not hard to spend a half million dollars on a four bore gun drill. Then another $250K on tooling (they are cheaper to tool up). An Eldorado indexing gun drill will hit your pocket for a million and a half, and then you gotta tool it up for a minimum of a half million dollars. I have not seen a new Pratt in close to forty years, and I'm not sure Albion is still in business. Those guys are or were the big players in gun drill operations( along with Seneca Falls), and a good used Pratt commands a serious premium even if it needs a rebuild. Then after you cut the bore, you have to invest in a honeing operation. These are not cheap as well, and the tooling can be expensive. Let alone the gauging operation. After that you gotta figure out a way to either pull or push the button thru the bore. Probably have to have a machine built. My guess is that a button operational setup will cost you about 150% more than a hammer forge setup, and maybe as much as twice the cost. The advantage the hammer forge has, is in speed, a far less money spent per part. Gun drills are slow no matter what brand, and that's only the first stage of the operation. You could hand hone barrels (and Savage might), or you can have an automated hone machine. Been around both types extensively, and an automated machine is a solid 3/4 million at the minimum. Eldorado makes an indexing hone that is good for about a tenth and a half if the stones are right (short shafts), and would probably hold .0005" or so in 26" once you got everything aligned correctly. These machines can be deadly accurate, and I've seen them run 200 pieces at well under .0002". Nice thing about an indexing hone is that everytime it indexes you have one finished part, and it ought to hone 26" in about three minutes assuming the bores were cut just right. The finish will be better than anyone can possibly hone by hand, and extremely strait.