20 vartarg loads?

Tory,

I have just started playing with my Cooper, but can give you some notes.
Using what I can find on the web concerning load data, I started with H4198. From what I could gather, a middle of the road load would be around 19grs., using a 35 Berger.
I started at 18grs. and worked up. Right off the bat, those loads were showing extreme pressure signs in my rifle. They shot well, but I ended up pulling about half the loads.

I "found" the Cooper load data chart, and it showed that Copper uses 20grs. of H335. I loaded some working up to 20grs. and the pressure signs were gone, and the accuracy was good. My OAL was 1.880" with the Berger.

I just got off the phone with Cooper, and they report their 20VT load is actually 18grs. of H335 with the 32 v-max at an OAL of 1.854"

Hope this helps...
 
Tory your rifle will tell you. The 20VT's I have like .020" off the lands with 32gr VMax. I don't know the OAL I just worked back until I found the sweet spot. Adam
 
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