Sizing Question??

[HEAD0001]

I just purchased an Encore barrel in 45-70 chambering. I am currently having a gunsmith do a little custom work to the barrel. I am having him do a MB, and install a Skinner rear ladder sight. I asked him to do a casting . The casting measured .4575 at the breach, and .4582 at the muzzle. I normally cast a Lyman 405 grain bullet for my 45-70's.

I have a Lyman sizer. Normally I size my 45-70 bullets to .458. What size do you guys think would be best for the barrel measurements I listed above?? Thanks, Tom.

[catkiller45]

..458 is all you need

[montana_charlie]

Note to self...
Watch this thread to see what the answer to THIS question is.

[MT Gianni]

Note to self...
Watch this thread to see what the answer to THIS question is.

I'm guessing 6 pages minimum.

[montana_charlie]

I'm guessing 6 pages minimum.
I want to see how people handle a bore that tapers the wrong way...
CM

[DLCTEX]

Lap the bore.

[buck1]

""4575 at the breach, and .4582 at the muzzle""
Ouch!
I am thinting 458-459 cast on the softer side. But I do agree with Dale.

[HEAD0001]

You guys are not making me feel very good about this new barrel??

I did have the measurement done by a professional. If a normal guy would have done the measuring then how many of us normal guys would have been able to detect any differences at all??

The actual difference in 7 Ten Thousanths!! Do you guys think that will make that big of a difference?? What is the tolerance of the barrel suppose to be?? What are the tolerances of the normal cast bullet barrel??

What can I expect if I lap the barrel??

Normally you guys have some great answers-So help me out here?? :confused::confused::confused::confused: Tom.

[catkiller45]

You didn't mention how it shot..If it is shooting good with what you have,leave it anlone then..But that is up to you to decide..

[HEAD0001]

You didn't mention how it shot..If it is shooting good with what you have,leave it anlone then..But that is up to you to decide..

I did mention that I just bought it. I have not shot it yet. Tom.