Unintended powder comparison

[ksubuck]

Was shooting Accubonds in the 7 rem mag and 7 STW. Ran 15 rounds through the factory rem mag using IMR 7977 and 15 through the STW with a Lilja barrel using IMR 7828. Was cleaning the barrels this evening and decided to do a little experiment. Cleaned with Boretech Eliminator.



The 9 patches to the left are from the STW and the 9 on the right are from the Rem mag. Notice a difference in the amount of copper and the amount of carbon? Maybe 7977 really does reduce copper fouling, but it seems to burn dirtier.

 

[JD338]

Interesting comparison.

JD338

 

[SJB358]

It's almost opposite to what I would have thought. I would have guessed at less copper from the Lilja but still a cool comparison.

How did they shoot?

 

[ksubuck]

Both are shooting very well and both are capable of shooting bugholes, the Lilja much more frequently. The factory barrel tends to hold more copper than the Lilja. I just thought I would check to see if the new Enduron powder really did help reduce copper fouling. This wasn't a scientific study but it was a fairly well matched setting for both rifles, 15 rounds down spotless barrels using the same lot of bullets.

 

[SJB358]

Cool comparison either way.

 

[Horsethief]

Good to know. Thanks for the info and the pictures.