Thread: Projectile Length to Ogive

Greetings Again.
Load data is next. I have mostly used the Hodgdons load data as it lists all the powders I use but the data for the 60 grain V-MAX tops out at 23.6 grains of BM8208 for 3,057 fps and 51,700 PSI which is very low presumably for use in semi auto rifles. A quick trawl on the interweb produced Hornady data for 60 grain projectiles running up to 25.3 grains of BM8208 for 3,000 fps. Next Load data dot com was consulted which turned up loads in line with the Hornady data from a Pet Loads by Brian Pearce. These top out at 25.4 grains of BM 8208 with the Hornady 60 grain soft point for 3,148 fps!
To be honest I am a little surprised by the variation. Generally the Hodgdons data is pretty good for US cartridges. The three data sets are likely produced using Hornady or Winchester cases which have similar weights and capacities from my measurements. Hodgdon and Hornady would have used a pressure barrel likely 24 inches and Brian used a factory rifle with a 22 inch barrel. What remains is to see where my 26 inch barrelled Varmint rifle sits and the chronograph will tell me. Will get back to you when I have answers.
Regards Grandpamac.