More testing with the JIM441505EPP. I've only had this mold 4 days and I can say the quality is 1st rate. The other thing is I've only just started to do any development with it but it sure seems like I can't make it shot bad!
Today I shot this bullet over 1 1/2 Swiss with .060LDPE wad on top loaded in BACO cases (neck turned) with a Federal 210 LR primer.
The charge weights were 86, 87 & 88 grains. I started with 86 grains because I always like to shoot a group with my current best load for a fair comparison. That takes into account conditions, how I'm shooting on a given day and most importantly the lunar phase.
The info is on each target (i hope).
So it must have been a good moon phase because all 3 loads are nearly 1 moa. The 86 grain load had me worried a bit as the first 4 shots were a vertical line, but the 5th shot made things look a little better. The two high shot and one low shot that are circled are from fouling shots with just random leftover loads of 1 1/2 Swiss.
The 87 grain load probably looks best but there isn't much difference in any of them as far spread.
I finally remembered to move up a 1 1/2 moa for the 88 grain load. Not a bad group either.
There is one thing I'm going to try before I try some other primers, but with these groups today I'd say I'm pretty much ready to go. the rest of the development will come over time.
The thing that is making this work so well right out of the gate is that this bullet was designed for my barrel and chamber and it fits pretty well. My rifle has a 30" heavy full octagon Krieger 17-twist barrel with a Shiloh standard grease groove chamber. Shiloh did the work and it was worth the wait (11 months). I went with the 17-twist to handle bullets long enough (heavy enough) for Creedmoor matches. I wanted the Shiloh standard chamber because I knew it would work well with paper patch bullets, either bore diameter or especially 2-daimeter. So far so good.
I only turned the necks on 15 cases because I wasn't sure how that was going to affect the accuracy. Now I have another 85 to turn. The necks as they come from BACO are .002 to .003" too tight for the Shiloh chamber, which is tight. They would work great as is with straight bore diameter paper patch bullets but the goal here was to use the 2-D design. I used Arnie Seitz elliptical design because it has a history of shooting well at long range. Thank you Arnie for your help.
I know from working with my other rifles that once you are shooting 2 1/2" groups at 200 yards any gains in reducing the group size take time and are small by comparison. Obviously good brass that is fireformed to the chamber is a big help in accuracy. I got a little ahead of myself with a "new" rifle and it is my first bottleneck. There is little point in mixing fireforming cases and load development with the .44-77.
This is a great cartridge and I am very happy I decided to go with it. It does seem like every other day there is one more thing I need to make loading this .44-77 easier or better. I think I'm getting to the end of the list of accoutrements now. The neck turning tool was the last item I added.
I'm looking forward to shooting this rifle at the matches I have remaining this year. I don't think the .44-77 will replace my .45-70 Hepburn as my Creedmoor match rifle, but it will serve as a backup and an option for when I just feel a need to shoot something different.