ORIGINAL: turkeyslayer34
CONGRATS ON YOUR GOBBLER!!!!!!
its good to talk to another 10 gauge lover.
.680 is tight for a 10 ga, remember that the bore is standard around, .776 so the constriction is 100 thousands, very tight. i could write a book on 10 gauges , shooting them for 15 years, now.. my set up is a rhino .685 with nitro 2.25 #5 hevi , i can put close to 190 pellets in a 10 inch cir at 40 yds at 1240 fps
i also shoot the monster 3 ounce nitro out of this same choke tube, 316 hits for that one in a 10 inch cir.
You could try the primos jelly head but Indian Creek choke tubes will be developing a choke tube this summer, and it will prolly blow everything away in its class, they have dominated the still shoot circut and hold every record out there. i have shot the haistings ported .695 and the rhino out performs the haistings on every shell out there.
also try the environmetal H13 hevi shot #5 load , it will vastly out perform the #4's you are shooting on pattern density and penetration.ive tested it and it shoots way tighter than the rem,win, and federal#4 lead loads, there is so much to talk about 10 gauges they will be making a strong comeback in coming years, check out oldgobbler.com (one word) there is a whole gang of 10 gauge shooters and reloaders there and they can help you.
I just started shooting Hevi-13 myself. I'm shooting a 12 bore though... but an 835... so I'd say its more like an 11 gauge

I happen to have a very good shooting gun.... 205 pellets in a 10" circle at 40 yards.... but thats with #6s.... for you to be getting 190s with #5s.... man thats a shooter! Love 10 gauges.... only thing I don't like is the weight!