I inherited my Dad's last deer rifle, a BLR in .308 Win. I doubt my Dad ever took a deer with it, because the one time I had it out to the range, it was shooting several feet to the side at 100yds.
It turned out that the scope was incorrectly mounted, and by the time I realized that, and remounted the scope, time and ammo had run low, so while I got it on paper, and close to center, I didn't do any grouping.
this particular rifle kicked me harder than my other .308s, most likely due to the way the stock fits me.
Trigger pull was ...meh... long, heavy and not very crisp. This is probably the biggest factor in these guns not shooting all that well. But well enough for minute of deer and moose should be something fairly easily done.
There is NO "most accurate caliber". There are only accurate rifles, and less accurate rifles, as individuals.
Hammer operation with a scope? I have used hammer extensions on Marlins, with great success. Some put the extension on the right side, I prefer it on the left. I don't have one on the BLR, simply because I don't use it. If I did, I think I would put one on it.
The repro single shots are generally fine guns, but have a couple of drawbacks. Mostly the stocks. Stock design, if faithful to the originals will not be well suited to using a scope (too low a comb).
And what might be the most important, shape and fit, particularly the butt. While it might be historically accurate, a skinny (narrow) buttplate, especially the crescent style is not as comfortable to shoot and manage recoil. Not a big deal in a light caliber, but a major one for me in a heavy caliber.
Trust me, nothing will teach you respect for the .45-70 black powder level load like a light rifle, with a narrow, curved butt with (sharp) points on it, top and bottom!
