I've had a Proof Trundra in 28 nosler for a couple years now. It came with their 26" 1:8.4 Sendero barrel, Defiance Ruckus action, Triggertech trigger.
I only started handloading recently. Prior, I had an out of state guy work up loads with a 150gr Barnes TTSX. It shot pretty well +/- moa at about 3350fps. Took an elk at 560 with it.
I've been working on a load using Nosler brass (so I can stick with one brand), 195 Bergers, N570, and 215m primers. Hit pressure a little over 80 grains and 3150 fps. Backed it down to 78.5 gr at 3030 fps and shot a couple groups at .020 off lands. Both 3 shot groups were right at 2" at 418 yards. Overlaying the groups they were .5 moa, which was plenty adequate by me.
Here's the reason for the post... when I started doing the pressure testing, the 195 Bergers were hitting nearly 24" lower than the 150 TTSX loads (at 418 yards). I dialed up to get it back on track before I shot the two 3-shot groups described above. I then loaded a few a bit higher to test the performance of a bit more FPS, and they impacted about 18" right and high... off the target altogether.
I then shot a few more of the 78.5 grain loads (the ones that grouped well with the first 6 shots) and they were all over the place, relatively speaking... greater than moa and very inconsistent impacts with original 6 shots.
Barrel has 200 or less rounds through it. My next step was going to be to double check scope torques (although I know they are good), thoroughly clean the barrel, run a few factory loads for fouling, and try some seating depth testing. If that doesn't work, maybe try the 180 hybrid.
My concern is the wildly varying load impacts and whether there may be a greater issue. I don't want to waste a bunch of time and components for nothing.
Any suggestions? Stick with the plan I have and see what happens? Consider a new barrel/ chambering? It should be a better shooter than it is acting...
Any feedback would be appreciated.
I only started handloading recently. Prior, I had an out of state guy work up loads with a 150gr Barnes TTSX. It shot pretty well +/- moa at about 3350fps. Took an elk at 560 with it.
I've been working on a load using Nosler brass (so I can stick with one brand), 195 Bergers, N570, and 215m primers. Hit pressure a little over 80 grains and 3150 fps. Backed it down to 78.5 gr at 3030 fps and shot a couple groups at .020 off lands. Both 3 shot groups were right at 2" at 418 yards. Overlaying the groups they were .5 moa, which was plenty adequate by me.
Here's the reason for the post... when I started doing the pressure testing, the 195 Bergers were hitting nearly 24" lower than the 150 TTSX loads (at 418 yards). I dialed up to get it back on track before I shot the two 3-shot groups described above. I then loaded a few a bit higher to test the performance of a bit more FPS, and they impacted about 18" right and high... off the target altogether.
I then shot a few more of the 78.5 grain loads (the ones that grouped well with the first 6 shots) and they were all over the place, relatively speaking... greater than moa and very inconsistent impacts with original 6 shots.
Barrel has 200 or less rounds through it. My next step was going to be to double check scope torques (although I know they are good), thoroughly clean the barrel, run a few factory loads for fouling, and try some seating depth testing. If that doesn't work, maybe try the 180 hybrid.
My concern is the wildly varying load impacts and whether there may be a greater issue. I don't want to waste a bunch of time and components for nothing.
Any suggestions? Stick with the plan I have and see what happens? Consider a new barrel/ chambering? It should be a better shooter than it is acting...
Any feedback would be appreciated.
