I got a 204 in a savage model 12fv, bedded it in a take off low profile stock, could not get better than 1.5" groups with factory Hornady 32 or 40gr. loaded some 40gr balistic tips with IMR4895, H322 and 4198 and it shot no better. got some 32gr vmax thinking the twist wasnt right for 40's, still didnt shoot under 1.5". had some W748 around but wasnt keen on it because I've heard it is temp sensitive, loaded 10 noslers and 10 vmax and it shot a.7 group with the 40's and a .5 group with the 32's. To get to my question, has anybody been using 748 in the warm weather and had any pressure problems? And I have also heard it is kind of dirty.