ORIGINAL: 8mm/06

Hello again,
I appreciate all the input I've received so far, but just one more question (for now anyway!)
My Carlson .660 choke arrived and I'll be heading to the range this coming week to pattern. Since I'm new to this I'm hoping to avoid doing anything stupid to my Mossberg 500A, 3".
I will be trying about 5 different loads but I'm only aware of 2 of the 6 right now. My 2 buddies will be bringing 2 different loads each and we plan on trying all 6 types in each of our guns for comparison. The 2 loads I'll be bringing are Remington Premier High Velocity Magnum in 3" , 1300 fps, 1 3/4 oz shot in #4, and the same thing but with #5's. Will these be safe and ok in my Mossberg?


My question is this, ... as long as I'm shooting only 3" loads is there anythingI need to steer clear of?... in other words, are there any 3" loads I should stay away from for fear of damaging my Mossberg?

Thanks in advance for any insight and advice you veterans have. I only have this one shotgunfor turkey this year and I don't want to end my season early for some bone-headed move on my part.