Keep in mind the throat diameters in these guns as well. The bullet must fit the throat rather closely for proper bullet alignment going into the rifling. With this in mind, here's what I would recommend for your guns:
.375 Win. .377" Bullet
.44 Mag. .432" Bullet
.45-70 .460" Bullet
You'll find that these diameters will perform optimally for you in the guns you're shooting.
Too, did you notice the tight spots in the bore when you were pushing the slugs through? Almost invariably, you'll have a tight spot under the forward magazine tube hanger (Marlins that have them) where it is dovetailed into barrel, and yet another where the rear sight dovetail is located. Many times these constrictions inhibit cast bullet accuracy, and necessitate a little lapping to relieve them for best results.
Hope this helps. Let us know what you find with them.
God Bless,
Marshall
<!--EDIT|Marshall Stanton|Mar. 26 2002,06:25-->
.375 Win. .377" Bullet
.44 Mag. .432" Bullet
.45-70 .460" Bullet
You'll find that these diameters will perform optimally for you in the guns you're shooting.
Too, did you notice the tight spots in the bore when you were pushing the slugs through? Almost invariably, you'll have a tight spot under the forward magazine tube hanger (Marlins that have them) where it is dovetailed into barrel, and yet another where the rear sight dovetail is located. Many times these constrictions inhibit cast bullet accuracy, and necessitate a little lapping to relieve them for best results.
Hope this helps. Let us know what you find with them.
God Bless,
Marshall
<!--EDIT|Marshall Stanton|Mar. 26 2002,06:25-->