Scope questions?

[nckped]

I have done some reading on this forum about guys who mount the scope directly to the barrel.  What is the purpose of eliminating the riser?

I have a Whisper and can't seem to get a sharp image of the cross hairs.  I can still see them well enough to know where they are and get pretty decent groups but I'm just wondering if their are any adjustments that can be made to clear things up besides the power adjustment.  It seems that right when I look into the scope I see everything perfectly but after a couple of seconds I lose that clear image once my eyes adjust (I shoot with both eyes open).  Any suggestions?

[leftcoast1]

If you scope is none A/O and has a fine focus on the eye piece sometimes that helps. I've read about placing the scope on the barrel but have never done it. Try turning the power down a bit as well to bring the picture into focus.

HOWS IT GOING

this might help, i copied it from a post i made a little while back, saved me having to try and make sense of my ramblings again
and if not use the link at the bottom to get some more information from the library

cover objective lens (front lens) with a piece of a white plastic bag, so you can see the cross hairs but not any thing else through the scope

now place the rifle on a rest and with both eyes open one looking through the scope at the cross hairs as normal and with the other eye look at an object that is at your typical shooting distance

now adjust the ocular bell (rear lens) until the cross hair is in sharp focus, make sure that your eye is relaxed and not forcing the cross hairs into focus, close your eyes for a few seconds and when you open them the cross hair should be in perfect focus immediately, if it takes a moment or two your eye is forcing it into focus and so more adjustment is needed

once the cross hair in in focus lock, mark or remember its position so you will not have to do this again, this is now set and should need no further adjustment for a long time

remove the plastic bag from the objective

now set up something like a newspaper at your shooting distance and look through the scope (as normal) if the image is not in focus and your scope is fitted with parallax/ focus adjustment (usually fitted to objective bell and has range markings) turn the bell one way or the other as required untill the target is in focus

if your scope has no parallax adjustment either on the ocular bell or on the saddle (on the opposite side to the horizontal cross hair position adjuster), turning down the magnification (if fitted) may bring target into focus

if not then your scope is not suitable for use a that (usually very short) distance and you can experience misses due to parallax error

to check for parallax, set up scope so it cannot move and point it at a distinct target, now move your eye up, down, left, right if the cross hair appears to move then the scope is not parallax free at that distance
so if shooting, each time you place the cross hair on the target the gun maybe pointing to a different part of the target, which of course results in lots of Misses and trying to use a scope like this will harm your eyes as they will try to force the target into focus which will then cause the cross hair to go out of focus and on and on

hope that's some use to you
fin

http://www.gatewaytoairguns.com/library/The%20A%20Team%20Scope%20Setup.htm

[jeebs73433]

I have had the trouble with some scopes. It might be that you have a bad scope, springers will over time distroy the inards of the scope. If its a new scope then it might be a lemon. Try a different one and see if that solves the problem or you might be right handed but your left eye is domanant and is trying to focas instead of your right eye.

nckped - 4/15/2008  10:46 AM

I have done some reading on this forum about guys who mount the scope directly to the barrel.  What is the purpose of eliminating the riser?

it is done because the riser hole (mounting pin area) will "egg shape" out from the thrust of the repeated spring firing. that will throw your scope out of whack. removing the riser removes the problem of this.

for me it also brought the scope down to a decent level so my cheek fit better......but the stock mount doesn't fit right there either.

-Mark

[leftcoast1]

Don't know where my head was when I read this post yesterday. I was thinking you wanted to mount the scope directly to the barrel and not to the factory rails. If you scope is getting blury after a couple shots sounds like the insides are coming loose. Factory Gamo scopes are paralax set at 35 yards. It sounds like that is being effected by the recoil. Try a different scope. The Tasco Golden antler 3-9x32 with A/O with a 1 piece accushot mount should fix your problem around 60.00 total. I have seen pistol scopes mounted directly on th barrel of AR's but I would be worried about harmonics. Good luck.