300WSM
Handloader
- Dec 24, 2011
- 1,048
- 661
I've always been concerned and avoided using a particular bullet/powder charge combination when the exact two items used in combination aren't printed in any data.
More specifically mfg "A" lists a particular powder using a 180 gr bullet(or any weight) made by let's say..... Speer....
But I want to use a nosler..( or any mfg not used exactly in the printed data) of the same weight and can't find the exact combo printed anywhere...
If the two...
specific powder and specific bullet...
aren't listed I just avoid using the combo until I can find said combo.
My thinking is although the two bullets are of the same weight the geometry of the two bullets will be different. Length, Boat tail or flat base etc
Which would change the pressure...
If I had both bullets I could measure certain areas but without a VERY EXPENSIVE comparator it would only be close...
I doubt I could find exact blue prints of the two bullets and compare that way
So.....
My ultimate question is am I too worried about this and as long as the weight is same the geometry has a negligible effect on pressure?
Maybe this is nothing and I'm being overly cautious ( i know one can never be cautious enough with loading ammo)
Thx in advance for any and all opinions on this
More specifically mfg "A" lists a particular powder using a 180 gr bullet(or any weight) made by let's say..... Speer....
But I want to use a nosler..( or any mfg not used exactly in the printed data) of the same weight and can't find the exact combo printed anywhere...
If the two...
specific powder and specific bullet...
aren't listed I just avoid using the combo until I can find said combo.
My thinking is although the two bullets are of the same weight the geometry of the two bullets will be different. Length, Boat tail or flat base etc
Which would change the pressure...
If I had both bullets I could measure certain areas but without a VERY EXPENSIVE comparator it would only be close...
I doubt I could find exact blue prints of the two bullets and compare that way
So.....
My ultimate question is am I too worried about this and as long as the weight is same the geometry has a negligible effect on pressure?
Maybe this is nothing and I'm being overly cautious ( i know one can never be cautious enough with loading ammo)
Thx in advance for any and all opinions on this