Chris;
Do you have one of the "Virtual Ballistics" software programs such as QuickLoad that allows you to enter the loading data and predict the velocities, energy and chamber pressures (and barrel pressures) of the loads you are shooting? If not and you would like to have this data send me a PM (with your email address) and I can run the data and send you a print out of the data and curves. Data required from you will be propellant, projectile diameter and weight, case length, primers, barrel length and bore diameter and so forth. I can send you the print out via your email address. The QuickLoad software that I have is produced in Germany and I just looked at the basis in it for 9.3x72R cartridges and there are two different 9.3x72R cartridges (1) 9.3x72R (.360) which has a case length of 2.835 inches or 72.01mm and (2) 9.3x72R Sauer which has a case length of 2.830 inches or 71.88mm.
Kind Regards;
Stephen Howell
Hi Stephen,
Thank you for the offer. I'll PM you and share an email.
My rifle is pre-standardization of the 9.3x72r cartridge. I have used 4895, without filler, and the results were not good (high variability in velocity, and poor accuracy, and velocity below factory loads.)
I switched first to H4198, without filler and that had the left barrel shooting small groups at POA, but the right barrel was off to the right and somewhat dispersed groups.) I added kapok filler to the H4198 just in time to run out of Hodgdon 4198, and switched over to IMR4198. Most recent load tested was 32grs powder and a 200gr jacketed soft point bullet by Hornady made for the 35 Remington. Bullet was 0.358" diameter. Primers looked fine after shooting. Velocity was at factory levels. Variation was greatly reduced from no-filler loads. Recoil was considerably more than the same charge and no filler. Next outing I plan to make 30 and 31 grain loads and keep everything else constant. I continue to deep clean the bore with Wipe-Out foam between outings. The bore was quite dark and is coming cleaner with each cycle. I'm not sure how good it will get.
Regards,
Chris
