Would an #1 profile(1.150" dia. reinforce, 1.25" reinforce length, .560@24") safely accomodate those chambers?
How much beef does one need surrounding the shoulder?

1.2 diameter on a 1.3 Receiver.

1.250 cyliinder length.

Timan

quote:

.560@24"

With a muzzle contour like this, you sure would not have a lot of beef in that barrel - in particular not at 24" with a .323" bore! It might be safe (?) to make, but you might well have trouble getting a barrel as thin as this to shoot. Everyone has their own preferences, IMHO, you'd need something like a .630" muzzle diameter for a .323" bore to be reasonably sure you could get it to shoot.

- mike

Any wifle of mine with a .630"muzzle would have a.375 hole down the middle of it...

As far as .560 at the muzzle, I think that would be fine for a 8mm.

My old FN actioned Sako in 375H&H is .575" at the muzzle.

I have 3 barrles on order from Kreiger, including a .308 tube that will be a.300 Weatherby. I think that one finishes up at .565 at the 26" muzzle, with a cylinder about like what you described in the original post. It was custom dimensions, so it doe not exactly conform to their typical profile. The other two tubes are .277 and .257, finishing up at .560 at the .22" mark. The only reason the .257 is so heavy is that Kreiger's machines cannot go lower due to their follower finger size. I will turn it down a little when I get it in the shop.

Your barrel dimensions are fine for the calibers you mention. I would say that accuracy wll not be affected at all if proper barrelling and bedding jobs are done. What will be affected is how quickly you cna shoot and how fast the barrel will heat up. If you want to shoot 10 shot groups, or even 5 shot groups with little time between the shots, then your groups will open up. So if this is a rifle only for the range, then I would consider going heavier. If this is a rifle to actually get used in the field, it sounds like you have a great profile for the barrels.

I have similar situation to yours,
...I wanted McGowen to turn an 280rem barrel .520"@24, cylinder 1.150 dia.x 1.25" but my smith told me they wont/cant do it...but I dont know the exact reason.