Canadian Airgun Forum

Actually, altitude has virtually nothing to do with the speed of sound.... EXCEPT as it affects the temperature.... Higher = colder = slower....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!

Life is too short to be wasted worrying about the opinions of others.

Max

Yarddog, are you 100% sure the scope is good? The Model 48's are hard on scopes, even though the scope seems tight on the rail, the internals of the scope could have rattled apart slightly.. I've seen it happen many times on magnum springers.. They kill scopes...

Also, Hobbies are bad pellets to be using in that rifle, too light...

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-= http://ultimateairguns.aimoo.com =- Our Site

I can't be certain but I think the scope is OK. It is a Tasco but clearly one of their better ones. It has an adjustable objective down to less than 10 yards so is obviously an airgun scope.

The thing which bothers me now is the barrel sleeve being loose. Still don't know if that is proper but will take it down later to see if there is any way to tighten it.

I gave it a quick try and the action take down screws were too tight. I will look for a large Phillips head screwdriver before proceeding. I noticed in one article on reworking the model 48 that it specifically said not to over tighten them.

Well I think I fixed it.

I separated the action from the stock and could see no way to tighten the barrel shroud. I then put on my reading glasses and noted two small hex head screws on the front sight. I had assumed they were just for attaching the front sight but I happened to have a bunch of hex keys beside me so checked them.

One was loose and the other totally loose, probably about to fall out. I had to turn it several turns before it tightened. After doing this, the barrel shroud was finally tight too.

I took it out and fired a test group using Meisterkugelns. The first (and only) group all went into one hole. One very large hole measuring about half an inch but still one hole.

I will keep my fingers crossed but this seems to have been the problem. Such a tiny little set screw made that much difference. I may eventually put loc-tite on it.

Excellent! Who would have though that a little loose screw
would cause so much grief...
Hope that was it.

Max

I was a bit surprised too. I had assumed the two small screws held the front sight on. In fact they have nothing to do with the sight. They keep the fairly large and heavy barrel shroud from moving. I suppose they are adequate as the gun looks heavy duty and I can't imagine them scrimping in a place where it would have been just as cheap to put a but larger screws on it.

The gun actually did feel a bit different while firing it.

While I had the stock and action separated I could see the spring through two small windows. It looked fine and obviously has had moly on it at some time as it is black. There was not a hint of grease tho and it seems it should have at least a little.

Does anyone know if a totally dry spring is OK?

just a peice of advice on any pal rated Springer do not use anything less then 16 grain pellets or you will damage the gun..

i only get to shoot pal rated guns when iam at my buddies place and even i know better then to run anything lighter then 16 grain pellets in them cause it will damge then gun when usuing lighter pellets, if you want more speed buy a faster gun or mod the pal rated one you have for more speed just make sure to keep with in all safty limits when doing this other wise it wont go well..

Why do you say that?

Magnum springers are rated from the factory with the lightest ammo available.

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Walter

thats a crock of crap, they are rated with pellets as per design all ariguns are done that way , really i thought you knew more then me but it seems you dont, but then again most of you wont take the time do your home works contact the companys and or design people to find out anything ..you just asume way to much to often,

id give you all the info youll ever need but then i dont get paid to do that sort of research , and people need to start doing their own research for a change,

i have seen even non pal springers run to light of a pellet and get wrecked from it, and you try and make us belive that even magnum class springers are tested with the lightest pellets out there ummm me thinks NOT..sorry ME KNOW NOT ,,

really light pellets are for non pal airguns and pal rated airguns that are pumper/pcp and co2 power plants only and should never be used on any springer gun pistol or rifle other wise damage can and will occrure usualy its the latter it does occure..

It may have escaped your attention, Kevin, but there are several air guns manufacturers that use lightweight pellets to bolster velocity claims. True, using a lightweight pellet in a magnum spring gun can cause damage to its internals, but your insistence on using nothing less than a 16-grain pellet in a PAL rated spring gun is not only silly, it is also a great way to expedite piston seal failure. Perhaps, you too, need to do some more research.

I can't remember one f'n post where you don't make a complete a s s out of yourself.. Airsmith, you REALLY REALLY need to do your homework....

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-= http://ultimateairguns.aimoo.com =- Our Site

"i wear big boy pants" LOL
here goes another pizz fest!

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Custom 1088 tactical w/NCStar RDS (430fps)
Umarex Ruger Blackhawk .177 SOCOM Tactical (490fps)
PRO77 (modified) .177 (350fps)
Looking to buy GSG92 used
Crosman .357

when is there not a piss war when it comes to me, oh well such is life and i dont care i know what i know and i do my home work

Firing the heaviest possible pellet out of an air rifle because it is magnum rated is bad advice. In fact, given the dynamics of a powerful springer, it can be just as harmful as firing to light a pellet. Because the heavier pellet offers so much more resistance the piston will bounce back from the cushion of air created. At the same time the tail end of the spring will have left its seat at the far end of the tube. Thats why needle thrust bearings placed there to counter act spring torque get pounded to bits. So now you have both ends of the spring racing towards the middle and the stress developed is worse than a dry fire. I always had the opinion that a 7.9 was to light in a 48/54 but testimonial on the Diana forum is conclusive that 7.9 is the ideal weight. Fella saying that has over 30, 000 pellets through his 54. No wonder Suprmatic lost his program trying to communicate with you. Do you even think before you post?