Hey Deersmoker.... Don't your 835 ulti-mag have the ulti-mag choke in it and not a accumag? That ulti choke they come with I think is .690 and I would think you could get alot better group than 13 or 14 pellets in the head at 25yds. I've been shooting a 835 for turkey hunting for about 6 years now and they are a turkey slayer.I wouldn't settle for that load IMO. You should get alot more hits in the head and neck w/ that 835 at 25yds, even with the factory ultichoke. I spent about $30 or so for a Hastings .675 and I get awesome patterning out to 40yds. I don't like a tighter choke because I like to shoot #5's and I think the tighter you get and the larger shot size you use w/ it causes more fliers. JMO..I also have used the 3'' and 3 1/2'' Winchester supremes #5's and the 3'' actually patterned better out to 40yds. with alot less punishment.