I set mine up to be a "flaming death" varminter. I shoot light 30 caliber bullets. I know a few years back somebody set some sort of 1k record with one using the heavy stuff. My gun is a 12 twist (I think-it's been a long time since I fussed with it, it's a closet queen now) and I once chronographed the 125 Noslers at 4375fps at the CorBon tunnel.
It doesn't take a genius to conclude with that kind of velocity barrels become consumables. . .
I imagine you could achieve some pretty good speeds with 180's. I'd guess at least in the 3600fps range. I don't suspect barrel life will go much past 1K rounds. Maybe even less. Probably close to what the big WBY gets.
No belt to deal with on the case. (they bug me) Easy to form the cases, easy to load. Just get a drum of RL22-25 and pour till all you see is the case neck looking back at you. Stealing the scoops from the candy isle bins at the grocery store makes quick work for dumping powder.
I made my own neck squisher die. Nothing special, it just gets the job done and the fire forming takes care of the rest.
That's about it. last time I played with this thing it'd hold sub 1/3 groups at 100. I've never had a chance to really stretch its legs. I'll get after it this summer and devote some time.
Brass of course requires dipping into the college fund, but such is the nature for anything good these days. One word of advise. Lapua brass is great stuff, but the rims tend to run a smidge heavier than Norma. If you have issues with extraction look here first. I just modified the T slot extractor and its run fine ever since.