Lyman 457132

[SgtDog0311]

This is not the 132 (subject of this thread) but rather a modified version of the 121 with some of the changes I'd thought to play with. From my Creedmoor experience with chambering/Blowtubing I would not anticipate a problem. Anyway, just a dry run of an initial change.

Could be a little short for an 18 twist I suppose but if Kurt and others have had no issue with the original Lyman don't see why you would with this length (ever so slightly longer).
   

Radius is very nearly exact to the original.
Nose (less the first driving band) is close to caliber diameter.
Lube grooves are shallower and volume could be increased by deeper grooves but keeping what Kurt said in mind there.
Base band is beefier, which I wanted.
Centers are within 2% of each other. BC and Form Factor slightly improved and weight increased to 455gr.
First driving band is bore diameter and base of nose is a couple thousands under.
Could possibly seat with one lube groove showing but I have not done a chamber cast yet (no cerrosafe at the moment).