I just got in the mail today I think is a crosman, I bought it off will piatts widow, the ad says crosman .22, is it a modified 2240? I’m by no means a crosman expert, the problem is that .22 pellets won’t load and jam and I have to push them back out, I peeled the camo tape off the receiver to see if there are any markings about caliber and make, nothing on what caliber and only RJ Machine on the other side, I have a tin of .20 cal jsb’s and figured what the heck I’ll try it, they load and shoot, so I assume it’s a .20 cal? Like I said I tried 4 different .22 pellets, different brands too jsb, H&N’s, Hatsan pellets and crosman pellets.. the gun came with a scope and when I took the second shot using the .20’s At a 3” steel target about 40yds away it hit it and with authority! I was shocked I thought this would just be a 20yd plinker.. maybe Will Piatt had this thing hot rodded?