Fitting a 2014 Eyetalian ejector rod housing to a 1967 Merikan Gun barrel. Work on the cheep part. No smasherwackers required. Just need the ejector rod housing to lay on the barrel, closely, just a touch of outward spring at the muzzle so when screwed down, its firmly attached and free of the wiggles without being bound or bent. A good fit, not a driven in place with hammers or ground with a bench sander fit.
So, clean up the circumference of the ejector housing lip where it enters the loop in the frame. The blueing was worn off from multiple fittings so those are the high spots to polish away with a very fine cut safe sided file.
Then using the barrel of the expensive part as the jig to fit the cheep part (always work on the cheep part first, and remember, as a rule of thumb, all parts, even the factory replacements will need some amount of fitting and rarely is a hammer or grinder the right tool)....about 25 strokes on 220 grit sand paper.
Here, see, the cheep part fitted to the expensive part...the ejector rod housing lip is fitted to the receiver loop for a slip fit, the curvature of the buttend of the housing fitted to the barrel for an ever so slight amount of spring out at the muzzle....much less than the nearly 1/8 of outward spring there was before.
It lays on there nice. Comes off and back on with out a fight and should clamp down firmly and solidly when the attaching hardware for the front end is completed.
Otay, less see.....a Ruger ejector rod screw, 8x40.....a barrel tapped 6x48 (plenty strong, more threads inna hole and room to buggle out the hole and replace it wif an 8x40 hole later)....so, how to fit that Eyetalian rod housing to the Merikan barrel.....
A chunk of 5/16" brake tubing from the upgrade of John Lee from single pot master cylinder to dual power master......split down the center so it can be wrapped round that too bigga threaded ruger screw.
Over to the drill press and file to carefully and cleanly remove that shank of 8x40 thread from the screw leavin only a whisker of shoulder to pull down the ejector rod housing to the barrel.
I need the hole in the screw centered in the head of the screw. So, install the screw head in the sleeve, clamp it in the portable hand vice and select a suitable diameter drill bit to slip into the sleeve and kiss the bottom side of the screw head....makin an indentation close enough to center so I can finish the hole with a proper tap drill. Heres the jig up.
The drill press belts are moved from 3000 rpm down to 250 rpm for this lil kiss of the bit against the underside of the screw head hidden in the sleeve. Drill deep enough to just center and align a much smaller tapping bit later. After which, I switch to a #31 bit that drills the hole to depth for a 6x48 tap and screw.
Starting with the 6x48 taper tap, I start the threads till the tap bottoms. Gently, member, its a blind hole and the first 8 to 10 threads on a taper tap are barely there....easy to rip out metal instead of cutting grooves. Quarter turn, back up to break the chip, back in for 1/2 turn, back up to break chip, .... Feel it touch bottom and stop!!!! Switch to plug tap and finish with bottoming tap. We have just about 8ish full threads in this dude, maximum strength with a threaded fastener is achieved with 3 or 4. Given the spacing and need to shorten the stud later, we'll have 3.5ish threads in the barrel and 3 to 5 threads engaged in the modified nut. Strong, strong. Remember, as few as 3 of these screws hold on over 1 lb of scope and rings on any magnum rifle forever and without shearing off, this will be just dandy here. No worries.
The line up....a Merikan Ruger barrel with a snugly installed and as needed, shortened threaded stud (will lok tite it later, after bluing), an Eyetalian ejector rod housing fitted to the Merikan barrel and a suitably modified Ruger ejector rod housing nut.
And it screws in and pulls the housing down against the barrel neat and like it were made fer it.
And from the nose end, ya'd never knew it weren't factory....but its better. Strong enough and rebuildable later, both the barrel and nut can be reamed for 8x40 thread in the future when some ham handed dude snorkes it down crooked and too durn tight and ruinates fairly good work. (Future gunsmiths send telekinetic waves of thanks to prior smiths that made provisions against Captain Hamhand an his 5 lb SmasherWacker)