Changing Cases

[PKT1106]

Hello-

I searched for a good while and may have missed this, but I have a question about changing cases for reloads. Lets say I am using a certain case with a certain reload and after their life has ended I want to get new cases. Now, I know it is recommended to rework the load with the new cases. However, lets say I used Winchester brass and when those cases died, I bought new Winchester brass. Would the new cases sweet spot charge be similar, or at least in the same ballpark, as the old case sweet spot?

Example: If my current load is 44gr of Varget with older WIN 308 brass, would it be close to the same with new WIN 308 brass?

 

[FCS]

Check case capacity between old and new brass. If same then you could reasonably expect charge weight in "new" brass to remain pretty close to what worked with "old" brass.

 

[ShtrRdy]

Along with what FCS said, I would load up a few at the usual charge weight and a few with a charge weight 0.5 gr higher and 0.5 gr lower. Then go shoot and check accuracy and velocity.

 

[Steel head]

An example is nosler 260 cases 41.5 gr R17 and necked up Win 243 cases matching speed at 41.9 of R17.

 

[juddroy]

test to the tenth of grain for your best accuracy, but new cases, as long as they are the same starting weight (before trimming) should produce = results.