Odds and ends
1 - Bullet diameter.
Although nominal bullet diameter is about .0005 off, .308" bullets work not just fine, but PERFECTLY in 7.5x55 rifles. As I said in a previous post, I'm talking about serious competition accuracy - not merely punching soda cans at 50 yards.
2 - Reloading data
I used to get all my loading data from the Hornady manual. Best results were obtained with IMR 4064 and 165-bullets. In a pinch, you can use .308 Win data - just back it off about 7%-10% and stop at 190gr bullets.
3 - Cartridge dimension and rechambering
The 7.5x55 resembles but is actually LONGER than the .308 Win. So, in order to rechamber a Schmidt for the Win, the chamber must be shortened (as opposed to reamed out). Given the good brass, bullets and loading data available, I think it's a real pity to deface such a pristine rifle for the sake of a little convenience.
4 - Sights.
Schmidt Rubin sights are of the traditional U-notch and blade front. However, there is a difference between how actual models are zeroed. My 1911 was zeroed at 300 meters (so I had to have the front sight raised), while my 1950's-vintage, SIG-made carbine is zeroed for 100 meters. Either way, it's a real cinch to get it to shoot at 100 Yards.
I hope this helps.
Tom