Testing a MatchGuns MG4 barrel

Greetings,

I was offered the opportunity to test a MatchGuns MG4 32 S&W Long WadCutter barrel.

Of course, I welcomed the offer!!!

The barrel is about 152mm long. The groove diameter is 0.3148", bore diameter 0.3035", with six lands and grooves. I did not measure the twist.

The chamber measures 0.339" at the front and 0.3425" at the rear.

All groups fired at 50 yards with the barrel held in a mechanical fixture.

Cheers,

Dave

Wow, very interesting.  The barrel diameter is significantly larger than what the MG specs indicate as I recall? However, the results are impressive. Even the Splinkers are ok. I use them for 25y often, when too lazy to bump them.