Question about BSA Big Cat 3.5-10X 42mm (3.5-10x42 mm)

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BSA rifle scope

I have a BSA sweet 17 rifle scope. can you tell me what size allen wrench is used on loosening the dial for the verticle adjustment?

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Re: BSA rifle scope - BSA Big Cat 3.5-10X 42mm (3.5-10x42 mm) Spotting Scopes

Its a metric 1.5 for the cam adjustments

Posted on Jan 15, 2008

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Every time i set the scope the pelets hit ese

I would check your pellets.

Light pellets typically perform horrible in break barrel rifles due to their tendancy to fly around

Make sure you have a stiff, tight fitting pellet. Smaller soft pellets also will contribute to accuracy issues as they deform much and can let air escape from around the skirt when fired (called "blo by")

Jun 26, 2009 | BSA Air Gun Scopes

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I can't arm my rifle 66 powermaster

there is a slot that says open open it and put bbs in.. close it ther is a switch on top pull it back... turn the gun upside down and shake it... push the button up... pump 3-15 times and pull back bolt... and push forward thenturn safety off and shoot

Apr 07, 2009 | BSA Air Gun Scopes

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Parts for Crosman air rifle 1077

Go to a Crosman service parts vendor such as who are in Canada

Aug 20, 2008 | BSA Air Gun Scopes

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Bushnell Sportview rifle scope wide angle 4x38 T4389 limited adjustment inconsistant results

I had the same problem but was able to solve it by shimming the scope mounts with a thin piece of plastic. Put it under the rear to raise the sighting and under the front to lower. I still plan to buy my son a better scope.

Mar 02, 2008 | Spotting Scopes

1 Answer

Nitrogen gas refilling in a rifle scope.

At a factory, the scopes are emptied in a vacuum chamber and nitrogen gas is used when the chamber is allowed to repressurize to the surrounding environment.

One possible solution is to re-assemble the scope in a clear plastic bag filled with nitrogen gas (working through the bag to re-assemble). Large plastic gloves can be taped into the sides of the bag.

Nov 13, 2007 | BSA Big Cat 3.5-10X 42mm (3.5-10x42 mm)

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Follow these steps

1) Mount your scope.

2) Use a bean bag or rifle mount and make sure that your rifle doesnt move much from its original position throughout this process.

3) Aim with the scope and shoot at a large backstop which will allow you to see where your shot lands, where ever that may be, it doesnt matter at this point. Again, make sure your rifle doesnt move much when firing.

4) With the rifle in the same position, look through the scope and adjust the crosshairs over to where your shot landed.

5) The scope now sighted in with the rifle. Minimal adjustment may still be required but at least your well within the ball park.

Happy Shooting

Nov 13, 2007 | Bushnell Trophy Multi-Reticle Red Dot...

2 Answers

Tasco propoint PDP2 scope

Are you looking set the eye relief or the focus ring?

For eye relief you need to loosen the scope in the rings, mount the rifle to your shoulder with your standard hold and cheek weld. At this point, slide the scope back and forth in the rings until you obtain a full field of view. Tighten one of the rings slightly, dismount and remount the rifle several times to ensure correct adjustment. Level scope and tighten rings a final time.

For focus adjustment (remember that you are using the eyepiece to focus on the cross hair, not your target!) loosen the lock ring and turn the eyepiece until the cross hair is focused. It is best if you check it several times by closing and opening your eye several times. The crosshair should be instantly in focus. If your eye must adjust, then you need to refocus until the focus is instant.

The two dials on the scope are for adjusting the bullet point of impact. They will typically move POI 1/4 inch at 100 yards.

Nov 08, 2007 | Spotting Scopes

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