Hunting Washington Forum

Equipment & Gear => Guns and Ammo => Topic started by: demontang on September 04, 2011, 08:52:13 PM

Title: 80gr gmx 243 load?
Post by: demontang on September 04, 2011, 08:52:13 PM: Anyone played with the 80gr gmx yet? Got some coming and I'm thinking of using some h414 or imr4064.
Title: Re: 80gr gmx 243 load?
Post by: high country on September 08, 2011, 10:09:44 AM: I have used 414 with lighter bullets, it would be on the edge of too fast with a 80 gr.....could go either way. I get good velocity out of the 4831 with 85gr tsx. I tried varget too but could not get close to speed without overdosing.
Title: Re: 80gr gmx 243 load?
Post by: demontang on September 13, 2011, 07:08:03 AM: Well I got the bullets now to start working up a load, they look long for a 80gr I hope they shoot well.
Title: Re: 80gr gmx 243 load?
Post by: demontang on October 01, 2011, 07:22:50 PM: Well finally got some loaded up and made it to the range. I started at 43.5grs of h414 and let's say it wasn't a pretty group at 9" next was 44gr and the group shrank to 7-8". The 44.5 and the group came in more to about 4". I was starting to doubt these shooting well. I loaded up max load of 45grs and tried it. I was shocked the group jumped to .75"!! No signs of pressure at all too. I thought about going up more but figured it was good with .75" group. I'll hunt the range again and really try to see how good it will shoot of a better rest.
Title: Re: 80gr gmx 243 load?
Post by: BULLBLASTER on October 01, 2011, 09:38:53 PM: thats pretty good, crazy what a grain or two of powder will do to groups.

what kind of rifle is it that you are using?
Title: Re: 80gr gmx 243 load?
Post by: 257 Wby Mag on October 01, 2011, 09:55:33 PM: Did you shoot em over a chrony demon? Got some 80 TTSX's to load in my 243. Later
Title: Re: 80gr gmx 243 load?
Post by: demontang on October 01, 2011, 09:59:57 PM: No crono yet but next year I'll have one. I have a mossberg 100atr. The thing is basically a savage and shots very well, it's light short and quick to point for coyotes.
Title: Re: 80gr gmx 243 load?
Post by: 257 Wby Mag on October 01, 2011, 10:05:09 PM: Right on. Maybe I'll load some up and tell ya how fast they're goin'. grin... Mines kind of a general purpose meat axe, model 660 rem with a 18 1/2'' snout. Maybe I'll load some up this week. Later
Title: Re: 80gr gmx 243 load?
Post by: demontang on October 01, 2011, 10:21:05 PM: I think I have a 20" barrel. And getting a gen velocity would help with the ballistics calculation. I'm thinking it's around 3200