Home Forums Reloading Big Game Rifles 7mm Mashburn and IMR7977

Hanco I sort of doubt it. The RUM has way more powder capacity, uses a longer barrel.I bet the biggest gains will come with the heaviest 7mm bullets.

But stick them both in a 24" barrel with 160-175 gr bullets and they might be close. I dunno.....never had a 7mm RUM.

There are faster 7mm's available than the Mashburn,especially today...but pure speed was not the only reason I built one...