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  • 3 weeks later...
Posted

i just started to make a few w/ re-15. got data from the sierra manual. (sierra match 168gr. bthp)

if i`m not mistaken, 42.0grs. is their accuracy load. (2,600fps. )

 

soon as i get some time i`m going to crony them.( just bought a new magnetospeed v.3)

 

i did however crony some using imr-4895. 41.5grs. is supposed to be the perfered load.

it is to give you around 2,550fps +,- 20.

 

but, using my rcbs Charge Master electronic throw-scale combo, 41.5 only gave me an avg. of 2,430.

had to go up to 43grs to get to 2,550. no pressure signs at all. and i was using L.C. brass

so i was aware of the thicker brass & the posssble higher pressures using l.c. brass.

 

had no idea the charge master was that "un-accurate". will make me re-think now some of my

other data i have accumulated over the years.

Posted (edited)

calibrate it every time before i use it w/ the 2 50g weights they give you.

i`m sure there is no problem with the scale. i just think the manual is a little

gun shy lawyer wise!  at 2550 to 2,600 fps, which is the velocity i`m getting,

@ that weight,( 43.0 grs. of 4895 ) i`m have no over pressure signs at all.

Edited by lx2008

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