Originally Posted by backwoods83
, RWS is stronger than any of the others, so unless your using compressed loads this just means you can have the same results with a lower powder charge, I haven't weighed any but I bet RWS is over 50 grns heavier.
Well, I will agree in some cases, and also I never use compressed loads. But I have tested this quite a bit and in my testing I have found the significant loss of volume with the RWS definitely requires a reduced charge of 3 gr or more with heavier bullets. This is both with the 300 win and the 7mm/300 win. We have seen best velocity from the same rifles, powder and bullets with larger volume cases like WW, RP, Lapua, and Graf. The RWS is great brass and tough as nails. But I feel we are giving up a little velocity using RWS.
I was involved in the building of Camp10's rifle. It is an awesome custom 7mm/300 win that shoots lights out and I have seen him shoot it to well over a mile. The initial load with 180 Bergers was developed using RWS brass but we knew we were leaving some velocity on the table. So I had him get some Norma in hopes it would have the same volume as Lapua or WW which is what we have gotten our best velocity with. So we need to test some more, but I too feel if the Norma is soft like Wheatherby and other Norma head stamp it will loose primer pockets too quickly like Norma brass typically does.
I should also add that my 300 win Lapua brass seems to be holding up better than any Norma brass I have ever used. I have many firings on it using heavy bullets and max charges. My velocity is great too. But I have also noticed that the primer pockets are loosening in some cases. This is not usually the case with any other Lapua headstamped brass I have used. The Lapua primer pocket fit remains consistant with all the cases I have used that Lapua actually manufactured. This I am sure is due to the involvement Norma had in manufacturing the 300 win brass.