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hadjii
Member Posts: 976 ✭✭
OK. I reloaded 5 rounds of experimental ammo for my 375 Ruger. Here's the load.
66.0 grains of Reloader 15
Speer 235 grain bullet, loaded to an overall length of 3.275"
weather conditions were as follows: Temp 80 degrees F, with a 19 mph SW wind, and I was shooting straight north.
By the chronograph:
Shot 1-2414 fps, Shot 2-2418 fps, Shot 3-2411 fps, Shot 4-2460 fps, and
Shot 5-2510 fps. Avg velocity-2443 fps, Standard Deviation-42.62, and Extreme Spread-99 fps.
Scope on rifle is a Weaver Super Slam 1.5-6 FFP, and with scope set at 6X, the dot covered a 2" circle aiming spot. 3 of 5 shots were within 1.5" and 2 of 5 were south of the group of 3 by roughly 2.5 inches.
Trying to figure out the 2 shots that weren't with the other 3. All screws are tight, angle screw torqued to 90 inch pounds, barrel floated, action glass bedded with pro bed 2000, trigger tuned to 2 3/4 pounds.
This was my first experiment with this powder. Previously was using 48.0 grains of 5744, with a 5 shot grouping of 2", but thought I'd try something different. Best group with this rifle was with 49.0 grains of Rel 7 behind a Hornady 225 grain bullet. I'm almost out of Rel 7, and there's none to be found within reasonable driving distance, so trying powders that are more available.
The loads I'm loading are reduced power loads for a spring black bear hunt over bait. I want to use the 375 Ruger, but don't believe I need full power loads with heavy bullets for blacks. Well, I also use the 375 with reduced loads for whitetails. Anyway, looking for thoughts or ideas on what I could do different to tighten groups up a bit as well as trying to figure out why the last 2 shots were quite a bit higher in velocity than the first 3. All charges were weighed on an RCBS 5-10 scale, which has served me well enough. Any thoughts and/or ideas would be appreciated. Thanks
66.0 grains of Reloader 15
Speer 235 grain bullet, loaded to an overall length of 3.275"
weather conditions were as follows: Temp 80 degrees F, with a 19 mph SW wind, and I was shooting straight north.
By the chronograph:
Shot 1-2414 fps, Shot 2-2418 fps, Shot 3-2411 fps, Shot 4-2460 fps, and
Shot 5-2510 fps. Avg velocity-2443 fps, Standard Deviation-42.62, and Extreme Spread-99 fps.
Scope on rifle is a Weaver Super Slam 1.5-6 FFP, and with scope set at 6X, the dot covered a 2" circle aiming spot. 3 of 5 shots were within 1.5" and 2 of 5 were south of the group of 3 by roughly 2.5 inches.
Trying to figure out the 2 shots that weren't with the other 3. All screws are tight, angle screw torqued to 90 inch pounds, barrel floated, action glass bedded with pro bed 2000, trigger tuned to 2 3/4 pounds.
This was my first experiment with this powder. Previously was using 48.0 grains of 5744, with a 5 shot grouping of 2", but thought I'd try something different. Best group with this rifle was with 49.0 grains of Rel 7 behind a Hornady 225 grain bullet. I'm almost out of Rel 7, and there's none to be found within reasonable driving distance, so trying powders that are more available.
The loads I'm loading are reduced power loads for a spring black bear hunt over bait. I want to use the 375 Ruger, but don't believe I need full power loads with heavy bullets for blacks. Well, I also use the 375 with reduced loads for whitetails. Anyway, looking for thoughts or ideas on what I could do different to tighten groups up a bit as well as trying to figure out why the last 2 shots were quite a bit higher in velocity than the first 3. All charges were weighed on an RCBS 5-10 scale, which has served me well enough. Any thoughts and/or ideas would be appreciated. Thanks
Comments
Unless it's a short stiff barrel I like about 5# of damping pressure applied at the end of the forearm.
I really like the original 5744, the new stuff not so much.
I would do 3 shot groups. With less than full case loads it's a lot trickier to find the sweet spot. Doesn't help that powder selection these days is poor.
Seat bullets 1/2 way, lower ram. spin shell 180 degrees then finish seating the bullet. Three to five thousands off the rifling is what I try for.
Charliemeyer007, how do I spin the bullet 180 degrees without marring it, and what exactly does that do? Not trying to be a smartalec, just never heard of that before. Also, the barrel is the ruger magnum contour, and I believe 23".
The 235 grainers I have are actually Herter's bullets, but they've got to be the same bullet as the speer 235 grainers. I'm thinking that at the velocities I'm loading, I'd say 200 yards would be a pretty fair shot, so if I'm getting 2 1/2" groups at 100 yards, I should be good for shooting over bait, however, I like tinkering and messing around to get as much as accuracy as I think I can get.
Thanks for the replies so far. Seems ya"ll have confirmed my suspicion of Rel 15 not being ideal, still it was worth wasting 5 bullets and a little bit of powder.