there seemed to be a bit of interest, and I hated to run all over Stevo's K31 post, so thought I'd give a quick run down...the Remington Rolling Block was adopted by Sweden almost as soon as it came out (1867, although mine was made in 1876), and besides Remington-made guns, the Swedes obtained license to produce them domestically in their own .50cal black powder rimfire round...fast forward 20yrs and real advances in firearms were coming out, repeaters, higher velocity small bore rifles, and even higher velocity smokeless powder (which still was unreliable initially and ate barrels for breakfast)...as a stopgap measure while they made up their minds which new weapon to persue as the gun for the army, the Swedes undertook in 1891 to convert many rolling blocks to a small-bore configuration which could go smokeless when the powder problems were solved...this was accomplished by re-heat treating the receivers, rebarreling the guns, and installing new steel blocks and hammers and associated 1/2"diameter pivot pins (the parts that all handle the pressure in a rolling block)...this last point was why I opted for the 8x58R version, as the Swedes had and have an excellent reputation for making exceptional steel from the very pure ore they mined...it was so good, that when Sweden went with the Mauser 96, they specified in the contract with the German company that a seperate production line be set up using only Swedish steel, and Mauser didn't even argue...and most know what a fine gun the Germans produced before WWI...by '93, the 8mm round was smokeless, and the rolling block handled it just fine, but that was about top end for that style action...but a 200gr .32cal bullet at 2000fps will do anything I ever need, and probably do it fine at lower velocities...I already mentioned in Stevo's K31 post how the 12.7mm BP centerfire round can be made from .348Win brass, and also wanted to point out that the 8mm round is easily formed by running .45-70 brass into a set of 8x58R dies (although annealing the case necks might be in order aforehand)...the neck of the case will be a bit shorter than the original, but is still plenty long to hold any bullet that one would wish to fire...and as a final option, the barrel is just large enough in diameter that it can be rebored/rerifled/rechambered to a straight .45-70 for under $300 from several excellent folk.....sorry for the OT post, but just wanted to fill in several blanks so that folk got a more well-rounded view of the things....