Are there any weight/volume calculations that one could make when changing brass? Say I've got a great load, I want to use a different brass but I don't want to go through a whole ladder/OCW test. Are there some calculations that will get me in the ball park, and then I just fine tune it? Thanks
Calculations for switching brass?
- Thread starter thefitter
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Re: Calculations for switching brass?
Yep, Chronograph will tell the tale every time. OCW is a factor of speed and to a degree pressure. In most cases you should be able to swap brass for brass w/ fair results. The other option is to do a water weight test vs. your two different brasses and then take an educated guess.
Cheers,
Doc
Yep, Chronograph will tell the tale every time. OCW is a factor of speed and to a degree pressure. In most cases you should be able to swap brass for brass w/ fair results. The other option is to do a water weight test vs. your two different brasses and then take an educated guess.
Cheers,
Doc
Re: Calculations for switching brass?
FGMM has a little more capacity than the LC brass. Most with the LC find a load in the 43-43.5grn area and with the FGMM 43.5-44.5grn. So if you have a FGMM load now and are going to LC then drop your load about a grain and load up 5 in .2grn increments and you will find the load again.
FGMM has a little more capacity than the LC brass. Most with the LC find a load in the 43-43.5grn area and with the FGMM 43.5-44.5grn. So if you have a FGMM load now and are going to LC then drop your load about a grain and load up 5 in .2grn increments and you will find the load again.
Re: Calculations for switching brass?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">FGMM has a little more capacity than the LC brass. Most with the LC find a load in the 43-43.5grn area and with the FGMM 43.5-44.5grn. So if you have a FGMM load now and are going to LC then drop your load about a grain and load up 5 in .2grn increments and you will find the load again. </div></div>
Thanks. What about Hornady brass?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">FGMM has a little more capacity than the LC brass. Most with the LC find a load in the 43-43.5grn area and with the FGMM 43.5-44.5grn. So if you have a FGMM load now and are going to LC then drop your load about a grain and load up 5 in .2grn increments and you will find the load again. </div></div>
Thanks. What about Hornady brass?
Re: Calculations for switching brass?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">About the same internal capacity as the FGMM. LC has the least, Fed/Horn/Lapua are about the same and Win has the largest. </div></div>
Thank you!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">About the same internal capacity as the FGMM. LC has the least, Fed/Horn/Lapua are about the same and Win has the largest. </div></div>
Thank you!
Re: Calculations for switching brass?
There may be, but I don't really think that's the point.
For me, the basic point is that when you change a load component, you no longer have a load; and you should drop back the charge and work the new one up.
My views have lately come to the point where I think we're collectively banking too heavily on computation and conjecture. No matter how much of that you do, you still need to try and see anyway.
The mind wanders when the ranges are closed for the season. Not a bad thing, but don't forget to keep that leash in hand.
Greg
There may be, but I don't really think that's the point.
For me, the basic point is that when you change a load component, you no longer have a load; and you should drop back the charge and work the new one up.
My views have lately come to the point where I think we're collectively banking too heavily on computation and conjecture. No matter how much of that you do, you still need to try and see anyway.
The mind wanders when the ranges are closed for the season. Not a bad thing, but don't forget to keep that leash in hand.
Greg
