110vmax and 135smk's are very popular, I use the vmax's. At 3180fps out of a 20" tube with a Rolling Thunder brake, 49g of 748, a lightened carrier from Triangle... Its loud fast and flat. Its an irons gun so naturally lighter than a TO rifle, about 9 pounds. Splits manageability, IMO, depends really on how aggressively you run the gun. If you're wanting to throw Benjamin's at it, you can get it fairly close to a 223... Maybe. Or, you can get out there and hang on to it and own that sucker. Think about our forefathers who were running full power .30-06 loads in their 06 Springfield's, garands, and BAR's. Like Benny says, grip it and rip it.