Hello, just wondering if anyone out there has any experience with this. In the December 1999 issue of Handloader Ross Seyfreid opines that the conversion factor is the proofed Cordite load multiplied by a factor of 1.19 to substitute Reloader 15. So, in Hornadys latest manual they list a max load of 64.0 grains behind their 400 grain softnose.in 450/400 3 inch. however, I am currently in possession of a side by side in caliber 400 jeffery that was built by Westley Richards for Lyon an Lyon. the barrel flats are stamped 400 express, 60,0 grains Cordite, which calculates to 71,4 grains Reloader 15, I have not shot this amount yet, but I have fired 70.0, and the barrels are close to regulation. with no signs of excess pressures. anyone else tried the Reloader 15 Cordite conversion that Seyfreid recommends ??? thanks in advance for any info.
reloader 15 powder in the Cordite cases
- Thread starter jsmurd
- Start date
Federal loads their .470 ammo with 87 grs. of RL-15, which works out to 1.16 compared to 75 grs. of cordite. That's without a filler or wad. Conversion factors are just a starting point, since there are several factors that influence velocity; different powder lots, filler or no filler, brass thickness/capacity, bullet choice, etc.
You say you're close to regulation; if your barrels are cross firing, the velocity is too high and you need to cut back. If the barrels are shooting apart, the velocity is too low and you need to increase.
If you don't already have it, pick up a copy of Graeme Wright's, Shooting the British Double Rifle.
You say you're close to regulation; if your barrels are cross firing, the velocity is too high and you need to cut back. If the barrels are shooting apart, the velocity is too low and you need to increase.
If you don't already have it, pick up a copy of Graeme Wright's, Shooting the British Double Rifle.
