Thunderstick, you can use whatever mag pouches you want as long as they are in the right place on you hip. Also Vanek's 1.5 lb trigger job is not legal because he relocate the pivot pin on the itself and fills in the old hole. According to production rule you can not have any external mods (with some exclusions of course, sights, grip tape etc.) and if you look hard enough you can see it is modifed.
Fortyfiveshooter: try 4.0gr WST behind a 230 LRN it is a VERY soft load, I have not yet chronoed it but according to Winchesters manual it goes 750 fps a 172 pf. So you can play around with that and shoot L10 if you want.