Thread: Burn rate / velocity / pressure / accuracy

Originally Posted by mopheadrob

Hey guys. School me on this please.

I get the relationship between pressure and velocity, and between velocity nodes and accuracy. I'm not sure how burn rates factor in to this.

Here's my question. I'm out of the powder I've been using for my 7WSM (W760), can't find anything equivalent but have plenty of AR2213sc. The burn rate is obviously different, but from what I have read it should be okay in the WSM. If I switched, would I have to start load development from scratch and find a new node, or could I estimate a charge that would give me a similar velocity and fine-tune from there?

Cheers, Rob

.270 Wsm is pretty close to 7mmWsm, I developed the load in my boy's .270 Wsm :150 Berger with 2213Sc, mild load going 3000fps, scope to easily get another 100fps without loading hard - you will be fine with 2213, stick to your current coal and start load at ADI max. Burn rate can be a red herring, especially when it's not comparing apples with apples, like stick vs ball.