longwinter,my 280 is a rebarreled rem 700,24" barrel. It likes 4350 or 4831. I use 139 and 145's in it.Some loads gave 3/8 " groups,most were around 1 to 1 1/4".I had it throated for 160's and it shoots these fine but I have several other 7mm guns. so I use the lighter bullets that I buy in bunches!