I have been casting and loading for my Mosin Nagant for about six months now. I started with Unique and some other recipes, but recently switched to Trail Boss. It is a bulkier powder and really makes loading easier (less chance of double charging.) I do not have all the stats but I have settled on a CTL312-160-2R dropped .315 sized to .314, Gas checked over 13.2gr or Trail Boss, CCI LRP #200, OAL 2.794 Groupings are about 2~3 @100 but really shines @25 and 50. Great for shooting at indoor ranges or small game. My recent trip to the range I dusted of my SKS. Well my range has a no steel core bullets nor cases (I know I know), something about mercury and stinky ammo. Anyhow most brass case lead core stuff runs about $10~15 per box, much more than surplus stuff. So in an attempt to bring the cost down, I worked up a load based on some online research. Now before you read on the cast load will not be enough to cycle the bolt, but I dont mind because I could weep when my sks flings my precious cases down range. So manual cycling will be necessary, and prudent in my case. I went with a CTL309-160-2R, dropped .311 no resizing and GC'd. The case holds 7.3gr of TB rather nicely and with the same CCI #200 LRP seated to 2.170. They fed without issue, with no leading in the barrel or gas valve. Grouping was 2" @25 and 4" at 50. Not the best, but I was dailing in a red dot for the cast load and ran only 20 rounds for testing. I normally use iron sites for FMJ loads. Anyone else been playing with Trail Boss lately?