Need some loading advice from the great people here.
So, I'm actually shooting the speer jacketed, and frankly in a 375 Ruger. BUT, a few things:
1. My node is at 66gr, which matches other people's ideal 375H&H load.
2. I think more people here have 375 H&H experience and it seems to directly apply to 375R.
3. I think cast booliteers have much more experience with IMR4895, with downloading, with downloading 375H&H with IMR4895, and that I'll get much better info from the brain trust of Cast Boolits than anywhere else.
So, here it is:
66gr of IMR4895 (seems to be more available than H4895) is doing really good for me so far. But accuracy is double what I want, and more than double what the gun is capable of in ideal situations. Normally, I start messing with OAL till things tighten up, but I'm worried that's not the right answer here. I believe this because I'm usually developing loads at or near 100% case capacity, and since I'm floating around 2380 fps with a reduced load, OAL is not going to appreciably change empty space in the case.
SO, known that cast booliteers are the masters of playing with light loads in big cases, What are the strategies you would recommend for this case, with the goal of decreasing group size?
- try a light dacron filler to take up some case space, test OAL changes
- stuff the case full of dacron so that powder is practically crushed, test OAL changes
- fix the OAL where it is, and try varying amounts of dacron filler from light to heavy, see what it does
- forget the filler because it's IMR4895 (you tell me, I don't know much about this powder) and just go straight to OAL as-is
- you're way of base Steve, what you need to try is _____________ (crimp, primer, different powder, or?)
Anyways, tell me about IMR4895 in reduced loads, what kind of tuning do you do with them when you are looking to make tweaks?
I am making a "cheap plinker" load in my 375 Ruger. It should be like a fat version of a 30-06 and match plains game ballistics of yester-year. While at the same time be great for deer/pig/black bear/elk/small motor vehicles/rabid wolverines/whatever, and even some medium range steel shooting when using a bipod and suitable scope.. I'm almost there!