.25 RKS: 

(.357 Maximum case trimmed to 1.470" and tapered with .223 die)

122 grain Paul Jones spitzer
9.0 grains H108 or WC820 or AA#9

S.Dave what velocity are you at and have you experienced any pressure signs. 

Seating depth, alloy and primers would also be helpful information. In regards to seating depth how many thous. are you engraving from the back of the bullet as every chamber varies and so does the length of the individual basebands. Comments such as half way through the baseband does not provide an accurate means to describe it. 

Average group sizes and or average 200yd scores on the ASSRA or ISSA targets would also provide important information on performance. 

J.Louis

The .25 RKS cannot be fired as a fixed case; it is only for breech seating.

I use the Remington 7 1/2 primers with 9.0 grains of powder for 1500 fps.

I breech seat the bullet with the base of the bullet fully seated in the lead of the rifle.

i.e. the Weber method of assessing bullet seating depth.

Place bullet backwards in the rifle. Measure the distance to the nose of the bullet. The length of the bullet plus the distance from the bullet's nose to the chamber end of the barrel is the distance that the end of your seater rod has to be out from the face of the case.

No signs of pressure when you use 12.4 grains and 1,816 fps; however you will get leading.

Quote:

Blufftmo, I believe you are in need of a Christmas present to yourself:  Complete Guide to Handloading, by Philip B Sharpes

There is more lead and jacket bullet loading data in this book for 25 calibers than you would be able to load and test in a lifetime.

I shot my 250 Savage 1901 Rolling Block today for the first time.  I used WW brass, WW primers and 33.0 grains of IMR 4895 behind the Speer 87 grain bullet.  Quick-load shows just under 2900 fps and I got about 1moa for 5 shot groups at 50 yards with a 16x scope.  Tom

Schuetzendave wrote on Dec 22^nd, 2011 at 11:01am:

OK! Always looking for a better way to do this accurate shooting stuff I dropped a bullet backwards in the chamber and measured the distance from the nose of the bullet to the rear of the barrel, the chamber end? =1.085 + bullet length 1.188 = 2.273". My seater rod is about 2.1" too short (story of my life) I must be missing something here? Maybe the bullet base should be 2.273" in front of the rear of the barrel minus the length of the Weber case 2.118 leaving the base of the bullet .155" in front of the case? 

Help?

rhbrink stick your bullet in the chamber backwards with an un-sharpened pencil the end needs to be flat. Push it until it just stops with as light a pressure as possible and no further. Now put a mark on the pencil right at the end of the barrel / case rim location. Now remove the pencil and the bullet and lay them down on your work bench with the nose of bullet touching the end of the pencil. Measure the distance from the base of the bullet to your mark on the pencil and that is the seating depth per Mr. Webers recommendations. To fine tune go in a quarter of a turn at a time on your seater and let your groups show you the exact setting you need to be at. I would not back up from there as the base of the bullet would more than likely not be totally in the freebore and if not it would then bump up and then be swagged back down of which would not be conducive to good accuracy.

Another approach would be if you know the length of your freebore of which is typically but not in all cases 100 thousandths, seat a bullet and push it back out and measure the un-engraved portion of the base of the bullet of which should be equal to your freebore or a little less than and again let your target determine the correct setting by adjusting from there. 

Some use the engrave half way through the baseband but if halfway is more than the length of your freebore of which is typically the case with most three groove bullets as well as some five then I would not use that approach as it will provide a false indication of where you need to actually start out at. This is the term you will hear most of the time to find the correct seating dept but as you can see by the varibles menitoned above it really should be abandoned for further use as it is very miss-leading especially to someone just getting started that does not know any better.


J.Louis