http://www.network54.com/Forum/79537/thread/1205202415/RWS+460+A+Design+Item+May+Cause+Low+Velocity+Problems

Written By Ed Krzynowek Professional Airgun Tuner

Submitted by
BBGun Bob

Springers are Neat! One Shot One Bullseye!

I can not bring up the link you providid.It says theres an error. Is there any way you can check it and make it available. I have a junk 460 and need to know. Thank you

EdK - hope you don't mind .

I got an RWS 460 in for some work after I finish some other things. Yes, others are already waiting on me, and they'll get theirs shipped back first. This rifle is probably the last one I'll be accepting for a while, until the other work is done. Anyway...

I always un-box a rifle as soon as it arrives. I check it for any shipping damage, and for velocity so I'll have a record of that when tuning-time comes. It's standard procedure.

Well, this particular 460 was sent here because the velocity was reported to be very-low. Although I'd suggested to the owner that he might want Umarex to have a look at it first, he decided to handle it this way--he wants a JM kit in it anyway. Good enough!

The velocity was in fact low--very-low. The first thing I checked was to see if there was a breech seal in place--yep, it was there and it looked fine. But, a better look at the consruction of the rifle with a Min-Mag flashlight told me a poor seal at the breech could still be the problem. It's 'loaded' or held shut with a very-small spring, and there's no tension adjustment on the arm of this under-lever, like there is on the somewhat-similar RWS 48/52/54 sidelever rifles.

A quick check might tell me if seal-issues were ultimately going to be the problem, and I'd rather know it now ("ix-nay with the suspense"). So, I cut out a flexible spacer and dropped it into the breech--it was time to re-test.

That was it. The velocity of mid and light-weight pellets immediately increased by 200-250 fps. Woah--that's what I call a success.

The rifle will get more than just a spacer before it's done, and I already have the planned-fix firmly in mind. The point for now is that I know it CAN be fixed, and how.

I also wanted to alert others here to the nature of the problem if they also run into it. Less work for me??? I'm not worried--I have plenty of other things I need to do, and I can't fix everything out there anyway.

Bottom line: Got low velocity on YOUR RWS 460? Check the breech for a good seal, or a lack thereof.





Happy Shooting!

Ed

The Airgun Tune-Meister
http://members.aol.com/_ht_a/ekreally/myhomepage/business.html

I sure wish this was the problem though.

NT
BBGun Bob

Springers are Neat! One Shot One Bullseye!

I happen to catch the post when it came out and it sounds very reasonable to me, Ed has always been very good and has run into alot of things working on guns so this has probably been the cause of the problem, only thing will be if someone can put it forth to RWS to correct the problem.

is all about attention to detail and figuring how to correct problems in the air gun world of ours.

he has done some tunes for me, in fact right now he has my model 40 for a full tune, when he receives a gun he anotates everything in a notebook pad he has and what work he will do to it, he even shoots it over a chrony and anotates fps.

I asked him for some work and he called me later and told me he would take care of some wood scratches and a nick in the barrel, this to me told me goes well above for his customers.

my 460 is away also with a member of this forum and is telling me I have a healty 460, wiil supplement the breech just as Ed K said in his post at the Yellow Forum and that was BEFORE Ed posted this observation on the 460

warren

PS: There are many fine tuners among us, it's just a matter of finding then

and remember "it's 30% the gun and 70% the shooter"