So I finally got out today to go shoot this Lyman GPR.
For those of you familiar with Arizona, I chose an amazing place to go shoot it. I went out US-60 past Florence Junction, to Hewitt Station Road, and right back against the east face of Whitlow Ranch dam near Queen Valley. This time of year there's no water back there at all, and several great berms to use as a backstop. Beautiful scrub oak and mesquite desert riparian canopy to get out of the sun if you really want to, but 65* temps make it just a wonderful day.
Not my pic, but you get the idea.
Starting load was 50 grains of 777 with a .530 round ball. I shot maybe half a dozen of those, really enjoying the hell out of it. Great big shyt-eating grin on my face. Mild. Very mild. Alexis even tried that and really enjoyed it. I bumped the charge up to 60 grains and it was still very mild, and I saw my groups start walking on paper vertically. I was shooting at about 25 yards, and saw the impact come up about 3/4 of an inch from the extra 10gr of powder. I walked it gently up to 100gr over several shots, and even 100gr wasn't unbearable by any stretch. Still very pleasant. POI came up about 3 inches with a 100gr charge from the 50gr impact.
I can't describe how much I enjoyed shooting that thing. I could sit outside all day and have an AMAZING time, and shoot maybe 50 rounds.
I really want to get out and get a better feel for it at 100-150 yards. I think I have a new favorite rifle in the safe.