I have two questions. First off, this sight is great, I have been visiting and learning for months. Any way, does anybody have an idea on primer sensitivity? I put light springs in my GP-100 and wondered what primer to stick with. I am also looking for a pistol in a bit of an off-beat caliber. I am looking at either a 357 Max or a 454 Supermag. I have 3 357s and would like something to take whitetails at longer range, not a 44 mag, but not a lot more recoil. I want to be different, but not abused. Thanks.