quote:

Originally posted by cummins cowboy:
I tried some in my 22-250 because they listed a max load of nearly 4k with a 50grn bullet, with the max load I was 400 fps below what the data said I should be, I was pretty disappointed with it, and will stick with RL 15

quote:

I have tried it in a 7/08 useing a speer 130 gr bullet and the max load gave me around 200 fps less than book load.

quote:

Originally posted by Stonecreek:

quote:

Originally posted by cummins cowboy:
I tried some in my 22-250 because they listed a max load of nearly 4k with a 50grn bullet, with the max load I was 400 fps below what the data said I should be, I was pretty disappointed with it, and will stick with RL 15

quote:

I have tried it in a 7/08 useing a speer 130 gr bullet and the max load gave me around 200 fps less than book load.

What's this "book velocity" crap? You guys should know that every rifle is a "rule unto itself" and results with a given load can vary substaintially between rifles. Just because you have loaded "max" load (by which I assume you mean the heaviest load listed by whatever source you are referencing) doesn't mean that that load is generating "max" pressure (or velocity) in your rifle.

IMR 4007SSC is listed at a relative burning rate of 17.2, as opposed to the slightly slower IMR4350 at 17.5. This is a perhaps a better guideline to how it should be loaded than to rely on data from another gun, the features of whose chamber and bore are unknown relative to your gun's pressure-controlling features.

If you've had good performance in a particular rifle with the IMR-series of powders and a powder with a burning rate between 4320 and 4350 is a good match for your cartridge/bullet combination, then there is every reason to believe that IMR 4007SSC would provide you with the anticipated performance ONCE THE LOAD IS ADJUSTED TO YOUR RIFLE AND BULLET.