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Homer78
Guest
Is there a rule of thumb to how tight to set the recoil spring on Unertl scopes? Thanks...
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F
f d shuster
Guest
unertl scope spring
Homer78: From the original "green" cover Unertl owners manual, page 28: " In most instances, the spring should be compressed about one-third its free length".
Homer78: From the original "green" cover Unertl owners manual, page 28: " In most instances, the spring should be compressed about one-third its free length".
Dick Wright
New member
Unertls...
I've shot a lot of them for years.
Rule of thumb... make the spring just tight enough so the scope returns all the way forward after the shot. No sense having it banging against the stop any harder than is necessary.
How tight that is depends on the caliber gun it is mounted on.
Counter-intuitively, they need to be tighter on a .22 rimfire than they do on a 300 magnum. Think about it...
I've shot a lot of them for years.
Rule of thumb... make the spring just tight enough so the scope returns all the way forward after the shot. No sense having it banging against the stop any harder than is necessary.
How tight that is depends on the caliber gun it is mounted on.
Counter-intuitively, they need to be tighter on a .22 rimfire than they do on a 300 magnum. Think about it...
C
chillippr
Guest
I set mine to "almost" return to battery, then pull it against the stop manually. Just don't forget to do the final positioning - it becomes second nature in a bit. Also, some folks using this technique turn the scope against the stop as they do the final positioning to maintain radial consistency.
Without..
a magnum tube clamp I've always had slippage on the clamp even being careful to make sure there is no oil on the tube. this on mostly a 10 lb .22-250.
I set mine to "almost" return to battery, then pull it against the stop manually. Just don't forget to do the final positioning - it becomes second nature in a bit. Also, some folks using this technique turn the scope against the stop as they do the final positioning to maintain radial consistency.
a magnum tube clamp I've always had slippage on the clamp even being careful to make sure there is no oil on the tube. this on mostly a 10 lb .22-250.
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Homer78
Guest
Thank you for all the responses - very helpful
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Tom in Mo.
Guest
This is a quote from the Unertl Co. Focusing and Use Instructions:
"Recoil spring should be compressed only sufficiently to return scope to original position. On .22 calibre rifle this will be about 1/2 the normal length. Big bore rifles require less tension as the recoil drives the scope forward a much greater distance."
(the words "less tension" are in bold print) (calibre spelled as shown)
"Recoil spring should be compressed only sufficiently to return scope to original position. On .22 calibre rifle this will be about 1/2 the normal length. Big bore rifles require less tension as the recoil drives the scope forward a much greater distance."
(the words "less tension" are in bold print) (calibre spelled as shown)
I don't want to dispute Unertl or Dick Wright but there is something about this that doesn't quite ring true. If you set the spring to LESS than is required to return the scope to the stop, which is suggested for high power, then you can't be sure it would ALWAYS return to the stop. I know high power is SUPPOSED to move the scope further from the stop but if it doesn't for some reason, such as a change in friction, then the spring set at reduced compression may not return the scope to the stop. I suggest the spring should be set to MINIMUM compression to return the the scope to the stop under the highest friction, period. ONE setting is correct for both rimfire and high power.