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The 1938B. I plan to shim the 1938 a 1/2 in and thats it, at least thats my thinking right now. The 1938b would be the one that I'll try to modify the stroke.

A quarter of an inch is significant. Also the leather plunger looks to be thinner than rubber, if so that would increase volume. I have noticed there are variations in cocking lever ends, different lengths and shapes which would effect the stroke as well. Or maybe just 2 being that varient you...

Yes, I had thought of your point that the plunger space at end is maxed out when released, thus the stroke would have to be gained on by moving the sear catch or the part at the end of plunger foward. Even thought of installing it upside down, which would give you almost an 1/8 of inch, however...

In comparison, I have a renewed respect for the current RR springs. I'll be modding this gun's spring as well. Ill post a pic of old spring as soon as I take apart. I could see spring thru oiler hole and it appeared to be a smaller guage spring wire. I have be re-reading some of your post in...

Got the RR 70s vintage. Disappointed, but to be expected. Low power. Could tell when I cocked it. So gonna get some parts hopefully next week and rebuild it. More to come...

I picked up a 1938 RR - 1972-1979. Are they any good? Should be receiving by the end of the week. The other gun I was referring to is a 111b lot # 1194... My memory is shot. It shoots very well.

Your pics just came thru. That is a beauty. I just watched a couple of vids and the buck seemed to have some punch to it. I went back and watched a chronyed buck that was coming in at 265ish. So I may have made an assumption, however I think I'll give it try. I like the chief AJ stock but cant...

That spring sticking out of the stock was a dead give away that it was vintage, and color. I'd keep it stock as well.

Wow! That is a deal! Good find! I am constantly watching ebay. I've been wanting a 111-40, 25 and 95. And 325fps average is respectable. I was thinking / hoping with these mods I might be in that ball park. I think i'm gonna try modding a buck next. They seem to have a little more fps out of the...

Thanks. Took out the crosman c41 with co2 that was in gun and it did penetrate bottoms of vegi and soup can. Dog food can was not tested as dog ran off with it. Lol. That gun chronys a little over 400fps.

Dog food can has a moulded bottom rather than crimped on bottom. Looks to be a softer metal. Bbs would not penetrate. Metal stretched. Mixed shots, point blank and at distance.

After looking at photo may have mixed up shots. I any case not seeing much difference.

Yea I was aware of that, i wear glasses and was still leary. Lol. I went out with a dog food can and it did not puncture bottom. That was point blank. It was raining up here which has been a daily occurrence for the last 2 months it seems, so testing was cut short. Ill be back home tomorrow...

Gun was purchased at walmat 3 months ago. Current production 1938b. As for the can it was a steel/tin vegi can, brand unknown. Range was 25 +- ft. As I pointed out would not go thru larger campbell soup can. Ill dig thru the cupboard and see if I can find a delmonte vegitable can. Face open end...

I did not modify the airtube. Was referring the one you sent.

I'd be shocked if I was seeing 350+ numbers. Ill go back out and try it again sunday as im going away for the weekend. I do have a crosman c41 that was chronyed by pyramyd air guns at the time of purchase for an rough average of 410 and a daisy 5170 at 480ish. Never crossed my mind.

Ok the spacer is 11/16 and the washer on end is 1/16 +or- for a total of 3/4 preload. Also drilled out air tube that I received. No other mods. Oil used was standard air tool oil, as that is all I had on hand.

On the barrel efficiency of the 25 and the 499, I was thinking that on the 25 the bb loader design resulted in less air loss and the 499 being muzzle fed would be even less. I know from your past research that the 499 id has tighter clearances. I then thought if shot tube was longer that it...

Thanks for info. Will check them out.