[Is the gp100 to large for concealed carry. For those of you who have it what are you using to carry it/how are you carrying it? Also on a semi unrelated topic. If I buy this gun with the 4 inch barrel is it still good enough to hunt deer with or do I need a 6 inch. Thanks again./QUOTE]
Within obvious limits you can pretty much carry concealed whatever you want to carry - with the caveat that you must be willing to make whatever changes/concessions/preparations that are necessary to carry it off in a safe, comfortable, secure manner. I agree with Playboypenguin when he recommends a 3" GP for concealed carry. I have carried a 4" GP concealed and, should you opt to do that, a very, very good gun belt is IMHO an absolute necessary. A 4" GP is nearly a 40 oz gun and the good gun belt will help to distribute the weight more equitably and, therefore, more confortably. I used a well made, leather pancake holster (forget the maker) and that worked quite well too.
I have been a handgun hunter for over 30 years and the major, practical advantage of a 6" over a 4" is sight radius. If you are a good enough shot a 4" will work well enough. I must hasten to add that, although I have taken deer with a 4" 357 revo I have come to feel that the 357 is really marginal as a deer hunting round. I have come to much favor a 44 magnum (or larger) for deer as the larger, more powerful round, IMHO, result in much cleaner and more humane kills in the field. FWIW.