Thread: The Howikka Test Bed

Originally Posted by Stocky

I've tried all the appropriate temp stable powders first. Im only looking to maximize what they will give me at this stage.

Im not chasing velocity just the most i can get from the powders I have before pressure (I didnt have good data for Varget and Staball Match yet so loaded same charge as the 77TMKs as I hadnt proven that load safe yet at the upper end of velocity yet.

Velocity is the best pressure sign (no free lunchs) when using GRT I can get a good indicator where pressure limits sit at what velocity with powder bullet combinations. I find up end of pressure burns powder better which is a good thing in a short barrel.

@gimp have an opinion on using the high velocity powder options that are temp sensitive? I think I could manage it but CBF dealing with the problems it can lead to running higher end loads. I dont want a summer and winter load personally.

While we are on this "velocity" subject I was pondering the other day why I can get about 1470 fpe of energy with a 69 gn but struggle to get the same energy output with 77s, is there a way of understanding this?