Im trying to develope an accurate load for my 700 vtr .243 using berger 95 vlds. Been using imr 4831 and 4350, better luck with the 4831. The best group at 100yrd has been about .75 in. Just ran out of primer and I'm wanting to know if another powder will likely give better results like wise will lapua brass give better results than my winchester or hornady left over factory ammo brass. been using br2 primers. Is .25 group too much to ask for with this gun? I'm new to reloading and any help would be appreciated.