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Scope mounts (Read 4019 times)

jhm Frequent Elocutionist Offline Posts: 2142 Location: georgia Joined: Sep 4^th, 2011	Scope mounts Aug 15^th, 2023 at 3:06pm	Print Post
	Recently purchased a full length brass Malcom style scope from a gentleman here. I didn't like the mounts so I am building some Malcom style. My question is does the scope have to be able to slide in the mounts? It will be going on a 74 Sharps build in 40-50 with 300 gr bullets. If it needs to slide how would I accomplish this feature? JMH


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art_ruggiero Frequent Elocutionist Offline Posts: 1224 Location: CT Joined: Dec 14^th, 2008	Re: Scope mounts Reply #1 - Aug 16^th, 2023 at 11:19am	Print Post
	yes


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Bent_Ramrod Frequent Elocutionist Offline Posts: 1601 Location: Southern Arizona Joined: Feb 8^th, 2006	Re: Scope mounts Reply #2 - Aug 16^th, 2023 at 12:05pm	Print Post
	The mounts generally have a spring or a spring and plunger setup that applies a slight amount of friction to the scope tube. The one on the rear mount keeps the tube pressed against the micrometer thimbles as well. It can slide forward from recoil (actually, the rifle slides back out from under it) and can be pulled back for the next shot by the operator. There’s enough friction to keep the scope from moving of its own weight; enough to eventually rub the bluing off the tube, but not enough to actually scratch the metal.


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18328 Location: Oregon Joined: Feb 2^nd, 2009	Re: Scope mounts Reply #3 - Aug 16^th, 2023 at 2:49pm	Print Post
	Some old scopes used a screw threaded into the scope body, and a V notch cut into the front ring to ensure the scope stayed indexed straight up when returned to it's position after a shot. This setup would be easy to add to your scope tube, and the front ring you make. A leaf style spring off the front ring will also give just enough tension to not let the scope move too freely, but move under recoil.

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jhm Frequent Elocutionist Offline Posts: 2142 Location: georgia Joined: Sep 4^th, 2011	Re: Scope mounts Reply #4 - Aug 16^th, 2023 at 5:11pm	Print Post
	The rear mount has been made in the style of an old Malcome. I will have to make a new block in light of the fact it must slide. But that isn't a problem. I have looked but can't find a good close up detailed picture of a front ring. I am sure I can come up with something. JMH


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jfeldman ASSRA Board Member Offline Posts: 1128 Location: Imperial Beach, Ca Joined: Nov 5^th, 2005	Re: Scope mounts Reply #5 - Aug 16^th, 2023 at 6:40pm	Print Post
	When I made my tube sight, I made a small V shaped block to fit the space between the "ears" of the front lock/locating ring and filed a corresponding notch in the front ring to locate it when pulling back to battery. Seems to work pretty well. Regards, Joe


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Kurt_701 Frequent Elocutionist Offline Posts: 1063 Location: Missouri Joined: May 20^th, 2004	Re: Scope mounts Reply #6 - Aug 16^th, 2023 at 6:52pm	Print Post
	jfeldman wrote on Aug 16^th, 2023 at 6:40pm: When I made my tube sight, I made a small V shaped block to fit the space between the "ears" of the front lock/locating ring and filed a corresponding notch in the front ring to locate it when pulling back to battery. Seems to work pretty well. Regards, Joe Nice idea.

	M-14 3rd Battalion 27th Marines RVN 68'69'
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lion Senior Forum Member Offline Posts: 251 Joined: Feb 25^th, 2012	Re: Scope mounts Reply #7 - Aug 16^th, 2023 at 8:27pm	Print Post
	This is how I did mine. A little bulky but it works.


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jhm Frequent Elocutionist Offline Posts: 2142 Location: georgia Joined: Sep 4^th, 2011	Re: Scope mounts Reply #8 - Aug 16^th, 2023 at 8:33pm	Print Post
	Since my last post I have done some more digging and found some closeup shots of the inside of both front and rear rings and I now know what I need to do. Going to take some fancy machining but that is I guess the fun part. We have had a good bit of rain this year so the yard and farm have blossomed with grass. Mowing takes up a good amount of my time but i decided the grass must wait till I get finished with this project. Priorities you know... JMH


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Cbashooter Frequent Elocutionist Offline Posts: 1634 Location: Eastern Wa. Joined: Mar 31^st, 2018	Re: Scope mounts Reply #9 - Aug 16^th, 2023 at 9:01pm	Print Post
	this is how Lyman did their "centennial" long scope. I think it's what Val is referring to


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18328 Location: Oregon Joined: Feb 2^nd, 2009	Re: Scope mounts Reply #10 - Aug 17^th, 2023 at 10:30am	Print Post
	Cbashooter wrote on Aug 16^th, 2023 at 9:01pm: this is how Lyman did their "centennial" long scope. I think it's what Val is referring to I had one of those scopes that came on a Ruger-Lyman Centennial, but been so long ago I'd forgotten how it indexed? My Souther and Sidle scopes both use a similar method to index them. I think this was pretty typical of older designs before the full length rib to align tubes came about. A lot of old Malcolm scopes simply were fixed, and didn't slide at all. How they withstood recoil and didn't break crosshairs is beyond me? Must have been pretty heavy guns with little recoil to do so.

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Sure shot Frequent Elocutionist Offline Posts: 1226 Location: East central Iowa Joined: Jun 22^nd, 2020	Re: Scope mounts Reply #11 - Aug 17^th, 2023 at 10:53am	Print Post
	The first scope that comes to my mind is the old Stevens scopes, which use the V notch on the mount and threaded stud in the scope body.


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burntwater Oldtimer Offline Posts: 633 Location: Michigan Joined: Feb 5^th, 2018	Re: Scope mounts Reply #12 - Aug 18^th, 2023 at 3:06pm	Print Post
	Interesting so let me ask how did Unertl handle this Rick


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18328 Location: Oregon Joined: Feb 2^nd, 2009	Re: Scope mounts Reply #13 - Aug 18^th, 2023 at 8:53pm	Print Post
	burntwater wrote on Aug 18^th, 2023 at 3:06pm: Interesting so let me ask how did Unertl handle this Rick With a rib on the bottom of the tube, and a matching notch in the front ring.

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Cbashooter Frequent Elocutionist Offline Posts: 1634 Location: Eastern Wa. Joined: Mar 31^st, 2018	Re: Scope mounts Reply #14 - Aug 18^th, 2023 at 9:26pm	Print Post
	marlinguy wrote on Aug 18^th, 2023 at 8:53pm: burntwater wrote on Aug 18^th, 2023 at 3:06pm: Interesting so let me ask how did Unertl handle this Rick With a rib on the bottom of the tube, and a matching notch in the front ring. Maybe I'm missing something the ribs are on top of my Unertls . Maybe I just have them mounted upside down......😀


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