I also shoot the Hornady 60 gr. V-Max in my varmint/target AR , I don't think one should be disappointed with a 3 shot group of under a half inch depending on what you are doing or scope you are using. While a 3 shot group of under a half inch wouldn't raise any eyebrows in benchrest circles it is certainly adequate for varmint hunting, that being said I put more faith in 5 shot groups. The only time I shoot 3 shot groups is to check my zero of already established loads at 200 yds. and beyond. The 60 ft. difference between 2 shots that was mentioned could be a variety of reasons, primer, case, seating of primer and or bullet, etc. A 5 shot group would tell more. I do not crimp any bullets unless they have a cannelure. The best 5 shot group I have shot with my setup is .566 center to center @ 100 yds. 20 inch Shaw bull barrel with a 3 X 9 hunting style scope calibrated for .223 Rem.
Lake City Brass
60 gr. Hornady V-Max
23 grs. WC-844 military surplus powder ( equivalent to H-335) of which I have several lbs. and have shot for years.
WSR primers
OAL 2.270"
Sad to say I have not chronographed this load as of this time but it is consistently accurate and falls in with the drop according to ballistic charts out to 400 yds. In most hunting loads I'll sacrifice a few feet of velocity for superior accuracy.