Hang on I will type louder.. did that help?

I have never heard a magnaported rifle, I have 2 rifles that are ported, a 450 marlin and a 375 H&H which are both very loud. The 375 was ported by a local smith and I am not sure it did much but make it louder. The 450 came ported so I can't tell if it helped recoil but it is about the same as my hopped up 45/70 loads.
Dad is trying not to add to the barrel length, It seems all holland or others and about 2 inches..