Odd BBLs From Numrich

sheepherder · 09-02-2014, 02:48 PM

I git the 6 1/4" barrel in from Numrich today...I'm somewhat disappointed...

It may not be readily apparent, but the taper is quite 'fat' up where the shoulder is...More so than a 9mm or 7.65mm [100mm/98mm] barrel [first pic comparing 98mm/7.65 barrel to Numrich]...

The Numrich barrel measures .710" at a point 5/16" forward of the receiver flange surface...The Luger 7.65 barrel measues .620" at the same point...

I tapered a home-made 9mm barrel using 7.65 dimension at the barrel band and the point 5/16" from the receiver flange surface (IOW, a stretched 7.65mm taper)...That's it [second pic] compared to the Numrich barrel...

While my homemade tapered & stretched barrel is no show winner, IMHO the profile is much more esthetic than the Numrich barrel...

I don't see why the Numrich barrel was made so 'fat' at the rear...

The 7.65 Numrich chamber is 'sloppier' than my Clymer-reamed barrels...Lot more 'wiggle'...Thread stub is right-on in length and diameter...Bore looks OK...

Flange/shoulder is artillery thickness; not 98/100mm thickness...Numrich front sight band diameter is .008" greater; flange dia is .020" greater; end of taper in front is .018" less...

The dimensions on the Numrich barrel don't equate to anything I have here...In 7.65 or 9mm...Even the 6 1/4" OAL length is odd...

I suspect I'll probably end up re-tapering it...So that it has a 'stretched 7.65 barrel' taper, like my barrel in 2nd pic...

Another Numrich mystery...

09-02-2014, 02:48 PM	#11
sheepherder Lifer Lifetime Forum Patron Join Date: Feb 2009 Location: ...on the 'ol Erie Canal... Posts: 8,198 Thanks: 1,416 Thanked 4,462 Times in 2,336 Posts	I git the 6 1/4" barrel in from Numrich today...I'm somewhat disappointed... It may not be readily apparent, but the taper is quite 'fat' up where the shoulder is...More so than a 9mm or 7.65mm [100mm/98mm] barrel [first pic comparing 98mm/7.65 barrel to Numrich]... The Numrich barrel measures .710" at a point 5/16" forward of the receiver flange surface...The Luger 7.65 barrel measues .620" at the same point... I tapered a home-made 9mm barrel using 7.65 dimension at the barrel band and the point 5/16" from the receiver flange surface (IOW, a stretched 7.65mm taper)...That's it [second pic] compared to the Numrich barrel... While my homemade tapered & stretched barrel is no show winner, IMHO the profile is much more esthetic than the Numrich barrel... I don't see why the Numrich barrel was made so 'fat' at the rear... The 7.65 Numrich chamber is 'sloppier' than my Clymer-reamed barrels...Lot more 'wiggle'...Thread stub is right-on in length and diameter...Bore looks OK... Flange/shoulder is artillery thickness; not 98/100mm thickness...Numrich front sight band diameter is .008" greater; flange dia is .020" greater; end of taper in front is .018" less... The dimensions on the Numrich barrel don't equate to anything I have here...In 7.65 or 9mm...Even the 6 1/4" OAL length is odd... I suspect I'll probably end up re-tapering it...So that it has a 'stretched 7.65 barrel' taper, like my barrel in 2nd pic... Another Numrich mystery... Attached Thumbnails __________________ I like my coffee the way I like my women... ...Cold and bitter... Last edited by sheepherder; 09-02-2014 at 09:18 PM.