Ported SP101 Barrel?

Greebe · Mar 18, 2011

I have seen a lot of SP101's that have had the barrels ported right up to the frame. Usually the ports are pretty large diameter holes that seem like it would effectively make the barrel useless for anything other than imparting spin on the bullet. It seems like this kind of radical porting would drastically reduce muzzle velocity.

Here is a pic of what I am referring to.

What do you guys think about these? Has anyone compared the muzzle velocity drop of one of these ported versions to the non ported counterpart?

Thanks
Greebe

Greebe · Mar 18, 2011

Seems like the muzzle blast would also be much worse with a barrel ported like this. Might be a little hard on the ears. Also it seems like one shot at night and you wouldn't be able to see for a while.

98Redline · Mar 18, 2011

Greebe said:
Seems like the muzzle blast would also be much worse with a barrel ported like this. Might be a little hard on the ears. Also it seems like one shot at night and you wouldn't be able to see for a while.

+1

The fireball that comes out of the muzzle along with what gets out of the cylinder gap is enough all by itself. Add the flash from the ports straight up into your line of sight and your night vision is going bye-bye.

Just my 0.02 but my SP-101 with full house .357 loads is snappy but if push came to shove and I had to use the gun in self defense, I don't think I would even feel the recoil.

Jayhawkhuntclub · Mar 18, 2011

Very interesting.....but STUPID!

reakin · Mar 18, 2011

Not just the noise, but the concussive force will feel like someone smacking you in the forehead with a brick. Not a fan of porting at all. Too much recoil, buy a smaller caliber gun. .38Specials in an SP101 are easy on the hands.

reakin

cwegga · Mar 18, 2011

I remember reading a good comparison of ported vs. non-ported sp101 barrels a while ago. If I recall correctly it was ~100 or 150fps difference. I'll go try to find it for you.

EDIT:
Here it is! http://www.rohrbaughforum.com/port.pdf