Author Topic: 50 yard sub-1" group  (Read 3313 times)

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50 yard sub-1" group
« on: February 23, 2008, 12:41:09 PM »
Don't give up on the Discovery! I've found the biggest improvement in the area of the trigger.

I did some work on the Discovery today. Crown looked OK but I gave it a polishing with 600 grit. Did the 3-screw trigger mod and stoned the mating surfaces then polished with rouge and moly burnish. More adjustment required but still way better than original. Installed a lighter trigger tension spring as well.

Sighted in the new Bushy Sportsman 3-9 and then shot 1-50 yard group after I was on target. If not for the one flier (my fault) the group would have really been sweet. I started off sighting in with RWS domes and then switched to JSB 15.9s. Once I was comfortable that I had it sighted in fairly well, I shot this group. I still have a few clicks of adjustment to get in order to hit the 10 ring at that distance. I really feel that with a little work, the gun will be capable of 3/4" 50 yard groups or perhaps less. Hopefully I'll have a chance to get out again tomorrow at that range.

There realy are 4 shots all in the same enlarged hole there (lower left) with one outlyer. The other holes are from getting it sighted in. Snow was too deep to keep trudging out to change targets.


Offline Erich99

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Re: 50 yard sub-1" group
« Reply #1 on: February 24, 2008, 11:38:31 AM »
Hey, great!  Glad to hear somebody's getting good results.  

How, exactly, did you polish the muzzle crown with 600 grit?  Does it take off the bluing? What kind of tool did you use to get in there?

I've seen a trigger mod for the 2260 somewhere on the net. DO you have any kind of link for how to do it?  Is it worth fooling around with for a guy whose never taken an air rile apart.  (About 50 years ago I was OK at taking apart my M-1!)
THanks,
Eric in Seattle

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Re: 50 yard sub-1" group
« Reply #2 on: February 24, 2008, 01:24:51 PM »
Eric - I had a dremel cone shaped bit that I wrapped with 600 grit and lapped the end of the barrel using a drill for lower speed. I took off the front sight housing before I did this. You need to get down into the front of the barrel to do this. I've also heard of folks using a round screw and toothpaste to polish the crown.

The trigger mod post can be found here - not hard to do but you will need a 6/32 hand tap.
http://www.spiralsol.com/airgunmod/tipstricks.asp

Offline dank

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Re: 50 yard sub-1" group
« Reply #3 on: February 25, 2008, 01:20:36 PM »
Excellent news. I had mine out today and feel it needs just a little work to be near what I want. I'm not at all unhappy but always could be happier. Thanks for the inspiration.
N.E.Dan
My favorite gun of all time is the last one I bought!!