best thing to do...since it jammed in your gun now....(hate to see it happen in the field) even tho it showed a pretty darned good pattern...use something your very sure of that works in your gun....remember...as a hunter, ethics are as important as the hunt and kill...you gotta think of what is right.

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With a pattern like that, one shot is all you'll need

Sounds like the brass at the bottom is swelling up'
And getting stuck.
Try rubbing some lube of some kind on the brass.
And try it again.

I had this happen with a 22 with federal bird shot.
It would swell up a little after being shot.
I would rub some oil on the bottom of the case
Before loading them and they,
Would eject like normal.

Hope this helps

Ray does NOT build junk and his quality is consistently better than factory fodder. His loads are simply VERY heavy and your gun might have a tight chamber and when the brass does expand at firing, yes you will get a hang up. LOL I also agree, with a pattern like that you WON'T need to worry about a second shot. "Follow up shots" are for those who aren't confident in their own shooting abilities. I have used Nitro exclusively for 3 years now and I have NEVER seen birds fall so hard as they do with this stuff. I mean they hit the ground like they have been laying there for a month! That glue is blown off the shell when it's fired. Its purpose is simply to keep the shell tightly closed because he packs them with so much shot and because his buffering is as fine as talcum powder.

Good luck,
RA

I have to say that looks like a pretty good pattern, if your aim is true you won't need to worry about a second shot. Does anyone shoot the nitro's out of chokes other than the Rhinos?

Artie, I use the same exact gun, and the same Nitro 4x5x7.5 shot its #301a. My shells are red, but I bought them when Nitro was still in N.Y. So maybe they've changed something since. But I've never had one of their shells jam up in my Mossberg. I'd definitly give them a call. Because obviously your gun is patterning better with the Nitro.
I'd also like to add gun wise, have you tried pump racking the gun a little harder? When my Mossberg Deer Gun was new I'd get jam ups if I didn't rack it hard enough until it broke in a little. I also placed a few drops of gun oil like Break Free in the slide rails both by the pump, and inside the chamber. So try that first.

I had the same gun and same problem. I called Ray and he credited my credit card for the shells and let me keep them. I forgot the reason he told me why it happend. This has been 4-5 years ago. I now use a Browning and they are great shells.

I bet if Win loaded 70% #7 shot in the shells they would pattern like that also

Thanks guys for the info

I got a reply from Sandy and she said that the Mossbergs always had cycling problems with the longer brass shells.She also said that she can send me some with shorter brass that wont have that problem.Not sure if i'll get the same pattern with the shorter brass but i'll give it a shot and see.

BuckAlly i did try to pump rack it but it was way to hard.When i got home i took off the barrel and tried to insert the spent shells into the barrel.The Winchesters went in with no problem all the way to the brass.The Nitros had a hard time getting even before the brass.