PJ, C'moor vs PJ, Postell in .45 cal.

[Kurt]

Kurt,

Reading about your throat reamer has sparked an interest because I have a 45-90 Shiloh on order right now. With this new reamer are you still able to seat the grease groove bullet in the case with all of the grooves hidden? I'd really like to know more about it if it keeps the leading down in the throat.

Robert

Yes Robert I shoot GG and PP in that chamber. It will shoot with all GG covered or set out I cant tell any accuracy change.
I took the bore scope and shot the PJ Creedmoor bullet and checked the bore after each shot fired and the lead started at the chamber end rubbed off by the 45 degree. It formed lead and paper rings with every shot fired and each following shot it smeared the lead forward.
Lets face it that 45 degree chamber end came about the time the .30-40 Krag came to life and it was needed to add more pressure holding the jacketed bullet back to get the new powder to burn more efficiently.
When the lead bullets were in use the chambers where different and the .22 rim fire still uses the lead bullet lead.
Below is a example of the two chambers.
I have two .44-90 bn's one with the standard Shiloh chamber (the top one) The bottom one is what I used for the second .44-90BN but this rifle I used a reamer I had made from a chamber cast of a original Sharps rifle that was like new but I shortened the tapered lead from it's original 3 degree to a 5 degree because I felt it might be to long but now I wish I would have used the 3 degree.
I like the original lead so much that I had orville use his 7 degree throating reamer to change the 45 in the Shiloh chamber.
I since took off the barrel with Orville's 7 degree and put a heavy 35" chambered with a reamer that is like the Hepburn used in there creedmoor rifle with a 4 degree/1.5 compound lead in the .44 100 2.6" straight chamber