Help with rimfire rail

[nelly]

G'day,

I have recently purchased a Marlin 70PSS "Papoose" take down .22 semi, and it is proving to be a fairly reliable little shooter, with about 600 rounds through it in the past three weeks.

However, what has proven to be an absolute dismal failure is the shallow 3/8" mounting dovetail on the receiver top. I have a little Bushnell 4x that brings the group sizes down to about 1.5" at 50m, UNTIL the telescope starts to slide backwards off the receiver.

I have tried cranking the mounting screws as tight as my twig-like arms can get them, breaking a sweat in the process, and applying permanent lock-tite, but still today, the scope shifted rearwards.

Clearly, the bushnell mounting claws can not get enough purchase on the wee little dovetail (and yes, it is a rimfire scope and mount).

I search for help, oh gurus of the glass....

Merci,

Neal

 

[(Ronin)]

One piece scope base,you'll get a lot more clamping power.

 

[Bush Man]

I have a Winchester 94 Lever action with the same problem you have. It has 3/8 dovetail groove cut int the action. I went and bought a weaver rail that slips in the dovetail grooves the full length then it has 2 screws to keep tension on the base from sliding. This also allows you to use weaver style rings. It worked great for me.

 

[nelly]

Yeah, I'm thinking that I need a full length mount, or need to get the dovetail cross-hatched or something.

Thanks for the replies, Gents - Off to the 'smith this morning.

Neal

 

[yodave]

bases/rings

Do a search for D and L airgun, they are in Langley and have all the adapter rails, or you can use the dovetail to weaver adapter from weaver, I believe it is the t-10 base iirc. the other option is to throw out the rings with the lock bar on the side that tightens the ring on the rail and get a split ring, they have more bite.

 

[P of PDent]

Try using a set of STEEL rimfire rings so they will have the same hardness as your receiver. These are made by Leupold, Millet, Burris along with several others. They will cost more than aluminum rings but should bite down hard enough to keep your scope and rings from sliding around. Another suggestion is rings made for airguns like B Square. Most of these are aluminum but one of the rings has an opposing screw that goes straight down and locks against the receiver. Hope this helps. Phil.