I thought my experiences might be of interest. I have been reloading lead bullets since the late 50’s, initially for pistols. Our pistols were taken away from us in 1997 after a school massacre. Gutted! Well compensated,I bought rifles. Lots of them,mainly Lee Enfields. Also a Marlin 1894 in .357” and a Ruger 10/22. Fortunately we can shoot all the old pistol disciplines with these last two.
The fullbore rifles are shot at Bisley which is not far from me. 303” ammo. is expensive and I initially started reloading using FMJ PPU bullets 174 grains (also expensive and getting more so)and PPU cases.
41.5 grains Reloder 15 is a great load but Vit 140 is as good and cheaper in the UK ,so that is my powder for service loading. A cheaper load is 22 grains 5744 behind a Lyman 314299 lead bullet and It suits most of my Enfields,I have eight,all in .303”. Wanting to shoot at 600 yards, I decided to experiment with the Lyman 314299 sized to the barrel of my 4(T) I found 34 grains of Vit 140 was the optimum load,after that short range accuracy fell away. Today I shot 34 grains Vit behind the Lyman, very successfully. The service load scope setting was 600 and I had to go up 17 , 1 minute clicks to hit the target to 825 yards.
The group was a bit scabby but is was wet and horrible weather. Things will improve .At least it reached the target,that’s a plus.
The bullet is 16 BHN , gas checked, Lee Alox lubed,(wonderful stuff , no leading ).Sized to barrel throat at .314”I only use PPU cases,keep them separate for each gun,neck size only and count the firings.,they last for lots of firings.I am well chuffed ,a nice cheap load and it worked!