I finally got out to sight in my omega. Shooting .50cal 240gr. xtp's with 90 gr. of BH 209. I am using federal 209A primers. The question is how tight should the primers fit in the breech plug? They seem to fit somewhat loose. I can seat them and remove them with my fingers very easily. I just want to make sure that I am not going to loose any power due to the loose fit. There is some blowback under the block, but I don't know how much is "normal". Thanks, Eric