Is there a drawing for Handi-Rifle rail holes? - Graybeard Outdoors
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post #1 of 14 (permalink) Old 03-05-2020, 06:39 PM Thread Starter
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Default Is there a drawing for Handi-Rifle rail holes?

I'm about to drill & tap a Pardner barrel for a scope rail as part of a caliber conversion. I realize I can get it pretty close by measuring the distance between the holes on the rail, but eyeballing the center of a hole isn't that accurate. If I'm going to do it, it'd be nice to have the actual spec and get it more accurate. Is there a drawing available somewhere that shows the spec distances between the screw holes?
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post #2 of 14 (permalink) Old 03-05-2020, 07:09 PM
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I wonder if you could epoxy a scope rail on with a few drops then level it with a bubble level, allow to set, then use that as your jig to drill the holes. Probably use a center punch before drilling to keep bit from wandering.

Sound like it would work?

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post #3 of 14 (permalink) Old 03-05-2020, 07:23 PM
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Got this on a google search. EGW scope base. I would compare before drilling
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post #4 of 14 (permalink) Old 03-05-2020, 11:19 PM Thread Starter
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Quote:
Originally Posted by neckisred View Post
Got this on a google search. EGW scope base. I would compare before drilling
Thanks for the info. I measured 0.995 and 1.290, so those sound reasonable. I'll see how it looks to put the 1.0 and 1.3 settings up against the base.
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post #5 of 14 (permalink) Old 03-05-2020, 11:25 PM Thread Starter
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I just realized, though, that the spread I measured was 0.995 rear and 1.290 front
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post #6 of 14 (permalink) Old 03-05-2020, 11:28 PM Thread Starter
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Quote:
Originally Posted by Lt. Dave View Post
I wonder if you could epoxy a scope rail on with a few drops then level it with a bubble level, allow to set, then use that as your jig to drill the holes. Probably use a center punch before drilling to keep bit from wandering.

Sound like it would work?
Thanks, Dave. Your suggestion gave me an idea. The reason I wanted to get the measurement exact is because I have a mill with DRO. So, if I have exact numbersto put into the DRO, the holes in the barrel will be exact. I've already zeroed up the barrel in the mill. What I can do is take the rail, mount it in a different mill vise, and use a wiggler to find the center of each hole. The DRO will then tell me the exact spacing to use.
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post #7 of 14 (permalink) Old 03-06-2020, 11:01 AM
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There's a suggestion in the FAQs by Larry for using the scope rail as a template.

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post #8 of 14 (permalink) Old 03-06-2020, 05:19 PM
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I measured the holes on one of my barrels a while back to draw up a scope base to make on my CNC mill - here are the dimensions I came up with - I need to check how far forward the first hole is because I was moving wanting to move the scope base forward - the .2" from the back of the base to the center of the first hole is not shere the hole is located on newer barrels. I'll try to get that measurement later tonight. Spacing between holes is accurate - at least the one I made bolted down just fine.


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Dan - Handi's - 157 22 Hornet Mannlicher Stock, 157 30-30 Mannlicher stock, 45LC Buffalo Classic Carbine with 22K-Hornet and .357 Max Talo barrels, 45-70 Buffalo Classic, 204 Ruger Ultra with Fluted Barrel, 223, 12 Gauge Topper Deluxe Classic, 20 gauge TDC, 20 Gauge Topper Junior Classic, Pardner .410 Youth, 17HMR Sportster, .357 Mag Handi...
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post #9 of 14 (permalink) Old 03-08-2020, 05:35 PM
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i don't mean to derail, but are the older toppers the same pattern? i know they take a different mount, just wondering if i could fit and bed a one piece mount like the deadnutz mount.

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post #10 of 14 (permalink) Old 03-08-2020, 08:24 PM
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Quote:
Originally Posted by treeslayer View Post
i don't mean to derail, but are the older toppers the same pattern? i know they take a different mount, just wondering if i could fit and bed a one piece mount like the deadnutz mount.
The difference is not hole spacing but was barrel contour/diameter.

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