TOBY458
AH legend
- Joined
- Jan 23, 2014
- Messages
- 4,404
- Reaction score
- 12,498
- Location
- Madison Georgia, USA
- Media
- 203
- Articles
- 3
I just started loading for my newly acquired Sako Brown Bear in 416 Rigby. I have been handloading for 35 years or so, and have never ran into the following problem.
I began with a starting load of 92.5 grains of RL22, with a Swift 400 gr A Frame. This is the starting load for this powder listed in the Swift manual. I am using Hornady cases and Tula large rifle magnum primers. This load is listed at 2300 fps, which is where I had planned to stop, if the accuracy was acceptable. I don't feel the need for more velocity than that for the distances I plan to shoot DG.
Now the weird part. I fired four rounds with this recipe, and noticed I was hearing the firing pin drop a split second before the rifle discharged. I was shooting iron sights at 25 yards, so I have no idea how it affected the accuracy, but I know this is a problem.
I have read where people sometimes use Dacron filler to fill up the unused case space in this rather large cartridge. I had hoped to avoid that.
My question is, if I went to a bulkier, slower burning powder like RL25, which is also listed in the Swift manual, would that help this issue? The starting load for it is 97.7 grains for 2301 FPS.
Also, I wonder if these Tula primers could be to blame? Would a CCI 250 cure the problem? The Hornady factory loads shoot fine, and they also seem to have plenty of leftover space in the case. So I know they aren't using a filler.
Any feedback would be welcomed.
Thanks!
I began with a starting load of 92.5 grains of RL22, with a Swift 400 gr A Frame. This is the starting load for this powder listed in the Swift manual. I am using Hornady cases and Tula large rifle magnum primers. This load is listed at 2300 fps, which is where I had planned to stop, if the accuracy was acceptable. I don't feel the need for more velocity than that for the distances I plan to shoot DG.
Now the weird part. I fired four rounds with this recipe, and noticed I was hearing the firing pin drop a split second before the rifle discharged. I was shooting iron sights at 25 yards, so I have no idea how it affected the accuracy, but I know this is a problem.
I have read where people sometimes use Dacron filler to fill up the unused case space in this rather large cartridge. I had hoped to avoid that.
My question is, if I went to a bulkier, slower burning powder like RL25, which is also listed in the Swift manual, would that help this issue? The starting load for it is 97.7 grains for 2301 FPS.
Also, I wonder if these Tula primers could be to blame? Would a CCI 250 cure the problem? The Hornady factory loads shoot fine, and they also seem to have plenty of leftover space in the case. So I know they aren't using a filler.
Any feedback would be welcomed.
Thanks!