BlessYoreHeart
Member
Hi folk,
I like the vihtavuori powders and wish to use them exclusively.
In order to develop various loads safely, I need a way to find a starting point for using a powder with no published data for a particular use. I'm wondering if anyone has come up with a method to find such starting points via comparison of components.
Example:
For 20ga, Lyman's 5 shows N330 at 16.5gr for 2-3/4 Remington STS hulls using 7/8oz. But nothing for N340.
However, turn the page and find N330 (16.5gr) AND N340 (17gr) using Winchester HS or compression formed plastic cases with a 7/8oz lead charge.
Problem 1:
I can only get (and have done so) N340 locally. So, comparing the two hulls, both use 16.5gr of N330.
The Winchester uses 17gr of N340.
So...it seems to me I could I safely start with 17gr of N340 in the Remington STS hulls.
Anyone experienced experts see a problem with my thinking?
Problem 2:
I also have N310 locally and I use it in loading .380 cartridges from the VV 2002 manual recipes.
Is there some method of correlation one can apply to get to a start load for the 20ga STS 7/8oz load using N310? Perhaps comparing powder densities of each powder or some such?
Any pertinent info would be appreciated Please don't suggest a brand change or start a debate on 12 vs 20 lol! The post is about methods to analyze published info. within a powder family to begin developing unpublished recipes for one's own use.
And no, I don't have pressure testing equipment or access to a lab
So I'm looking for the tried and true tactics some of you have established to arrive at a load you're comfortable with using observation as your main tool. I do have a chrony but that is my only analytical hardware
Thanks much!
I like the vihtavuori powders and wish to use them exclusively.
In order to develop various loads safely, I need a way to find a starting point for using a powder with no published data for a particular use. I'm wondering if anyone has come up with a method to find such starting points via comparison of components.
Example:
For 20ga, Lyman's 5 shows N330 at 16.5gr for 2-3/4 Remington STS hulls using 7/8oz. But nothing for N340.
However, turn the page and find N330 (16.5gr) AND N340 (17gr) using Winchester HS or compression formed plastic cases with a 7/8oz lead charge.
Problem 1:
I can only get (and have done so) N340 locally. So, comparing the two hulls, both use 16.5gr of N330.
The Winchester uses 17gr of N340.
So...it seems to me I could I safely start with 17gr of N340 in the Remington STS hulls.
Anyone experienced experts see a problem with my thinking?
Problem 2:
I also have N310 locally and I use it in loading .380 cartridges from the VV 2002 manual recipes.
Is there some method of correlation one can apply to get to a start load for the 20ga STS 7/8oz load using N310? Perhaps comparing powder densities of each powder or some such?
Any pertinent info would be appreciated Please don't suggest a brand change or start a debate on 12 vs 20 lol! The post is about methods to analyze published info. within a powder family to begin developing unpublished recipes for one's own use.
And no, I don't have pressure testing equipment or access to a lab
So I'm looking for the tried and true tactics some of you have established to arrive at a load you're comfortable with using observation as your main tool. I do have a chrony but that is my only analytical hardware
Thanks much!