Thanks, no, not with a curved butt plate! I'm thinking that would NOT be a happy thing.
I
was looking for advice and suggestions, and thoughts on my intended load components and goals for a hunting & plinking load, all of which I got.
And based on replies from other owners of Miroku Wnchesters of recent manufacture it seems that my initial component selection is reasonable. I will slug the bore to confirm groove diameter, but it seems likely that the chamber is indeed the longer dimension, which makes using the 2.125 brass sensible and do-able.
I'll take the actual load advice as reasonable initial maximums and work up to them with my components until I get good groups at or near my desired velocities, which may well now be several hundred fps slower based on experiences you fellows have shared.
On the other hand, it doesn't seem like 1700-1800 fps is an unreasonable velocity goal for THIS rifle and component combination if it groups well and doesn't beat me up.
Thanks again for the info and insight. -WSJ