I'm a new Guide Gun owner. I bought some Bitterroot Valley ammo to start with (405grain, supposed to get 1600fps). Then I picked up some Black Hills cowboy ammo (also 405 grain, but only 1250fps). I fired about 10 of the Bitterroots last week just to get a feel for the gun. The recoil was very manageable. I was looking forward to trying out the Black Hills, since I figured it would kick considerably less. Today, I fired a few of the Black Hills, and I can't say I thought the kick was any less. So I loaded the gun with one of each kind, without knowing which was which, and fired the two shots. I didn't notice any difference at all in how they felt. Same kind of bullet, same weight of bullet, supposed to be 350fps difference...and it shoots exactly the same? ??? Not that it matters. I'm just wondering what's up. In searching the web a bit, I found one guy who said his Bitterroot Valley chrono'd at something like 1100fps. So maybe mine is just way underloaded? Any thoughts?