Went out last weekend to shoot my new 870 12 ga. Well I bought some remington high velocity 5 shot 3 in mags for it. I pulled the trigger and the primer went off and the powder just burned up and smoked. i jacked the shell out andsaw it was melted towards the top. Took the barrel off and noticed the wad was still 3/4 of the way towards the muzzle. So i pushed it out. there was no shot in it. I took the bolt out and inspected everything everything was fine. So i shot a #6 2 3/4 shell out of it fine. i think it was just a faulty round and do not want to shoot anymore of those shells. any one ever see this or no what happend?