Thought I would update the status of my Crosman Remington NPSS .177 and problems I had with inaccurate grouping and the outer barrel turning.
I called Crosman and they agreed to repair my barrel problem, they sent me a postage paid UPS label and I sent it back. I added a note in the box saying that if they couldn’t fix my gun and if they were going to replace it, if they could upgrade me to the .22 cal. (someone recommended this to me on here, cant remember who)
It took about a week and I received my brown box via UPS. I opened it up and to my surprise not only did I receive a brand new sealed gun, but the .22 version.

Thumbs up to Crosman for their customer service!
I have put about 80 rounds though her and I have to agree with what others were saying that it does group a lot nicer. I’m planning on ordering some pellets, and from what I’ve read, the heavier seem to be more accurate, "H&N Baracuda Match .22 Cal, 21.14 Grains" and
"JSB Match Diabolo Exact Jumbo Heavy .22 Cal, 18.1 Grains". Might also try a sampler pack as longislandhunter recommended.
Now on to my major booboo.
Tonight while shooting the cell phone rang and being distracted when I came back to the gun, I thought I had a pellet in the bore, I didn’t. I accidently DRY FIRED IT! Have I majorly screwed up my gun? Maybe taken some life out of the piston?
I'm not sure, I would like to hear some feed back.
Thanks for all your support and advice.
Dan