First I have to ask what type of rifle you intend to load for. For example, if your loading for a swedish mauser, there is no way you'll ever be able to seat the bullet .010 off the lands due to the length of the throat. In that case seat the bullet out as far as you can while ensuring that it will fit in the magazine and cycle properly. I have had really good results with 42.0 gr of I4350 and WLR primers, with the col of 3.15". This load produces an average three shot group of 1/2-3/4" at 100 yds. Now mind you the rifle is a Husqvarna commercial with a deep-throated milsurp barrel factory cut to 26". Bullet selection, these groups are with 140 gr corlokts, which I WILL not use for hunting due to what I feel is poor quality, for hunting I would prefer Hornady Amax, or Sierra Gamekings. As far as trim to lengths on the brass I use the Lee case trimmer guides which take you to the SAAMI trim to length. If you shoot the swede regularly I think you'll find it to be quite a nice choice for accuracy, mild recoil and terminal performance. For many Europeans the swede is the standard and is used to hunt all variety of big game. It will certainly take just about anything on the North American continent with the exception of the largest of dangerous game.