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PostPosted: Fri Aug 24, 2018 12:51 am 
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Location: Bowmanville, Ontario
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Shawn


Fully rebuilt Benjamin .22 classic
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PostPosted: Fri Aug 24, 2018 12:52 am 
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Shawn


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PostPosted: Fri Aug 24, 2018 8:40 am 
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Location: GTA, ON
THAT is a super nice job done!!

I can't wait to see the result of all this add-ons ~

If all these working as planned, will it be as accurate as the high end springers now? Like the HWs, TX etc....

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PostPosted: Fri Aug 24, 2018 9:44 am 
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I certainly freaking hope so!!

Technically, I can't see why it wouldn't be. The only variables now are the scope, pellet instability - the actual barrel construction, and of course, me. All very possible issues. However, previous tests have shown promise that those issues are somewhat under control.

In reality, the gun should actually fire smoother now with the barrel solid. The wiggling around would certainly have added turbulence in the guns harmonics.
This is all assuming the actual gun itself, the materials used, and the connections are solid, and we'll enough made to actually have a smooth harmonic... Only testing will prove that.

The only thing I'm unsure of at this point is the breech seal. It MAY be a bit too proud for the breech lock up. I have the seal shimmed. I may have to play with that.

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PostPosted: Fri Aug 24, 2018 11:07 am 
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Nice work there!
Be watching for accuracy and longevity from that redesign. Keep is posted eh!

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PostPosted: Fri Aug 24, 2018 3:37 pm 
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Great work!

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PostPosted: Fri Aug 24, 2018 5:03 pm 
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Preliminary results are mixed. I had to re-zero almost a turn and a half. I need to see what’s up with that. I had the scope off and the rings off, but that turn and a half is a long way off.
The gun was having a hard time with the barracudas. Was getting more fliers than usual, what wasn't a flier was grouped reasonably. Nothing as shocking as I was hoping out of the gate. But expectations were pretty high... Seemed to do better with premier 14 domes.

Gun feels good. Smooth. But I’ve got some things to investigate. Need to make sure the breech is closed nicely, that I didn’t introduce an offset that may explain the drastic re-zero. The re-zero was mainly only elevation. Need to make sure the scope is alright. Need more pellets to do more testing.

More to come...

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PostPosted: Sun Aug 26, 2018 1:38 pm 
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Ok. I think we're onto something. After the first set of testing, and I found some time, I took the rifle apart again to see how things held up for the short session.
Bushings look good, no signs of unusual wear. I turned my attention to the breech seal.
With some feeler gauges I figured out how much the seal was holding the breech open. About .006". I took the shim out from under the seal, breech closed up tight enough I cannot see a flashlight light through the crack. However, on the underside there is a gap, so the breech fitup is tapered. Should be fine as long as the seal can bridge the gap. So that tells me the gun is an upside down Boomerang... To a minute degree...
I would have liked the breech to be intimate across the whole face. When I reamed the new hinge hole screw I indicated center of the stock hole. This tells me the stock hole is further rear than it should be. I could correct this with a bunch of measurements and remaking the bushing. IF the rifle shoots poorly or I wind up with poor compression.
I also wanted to get rid of that .002" wiggle that remained. So I slathered up the head of the hinge screws tapered head with anti-seize and cranked it in there as tight as I was comfortable with before either stripping the head of welding the screw in the tapered bore. I was able to get rid of that wiggle.

I have time today and in currently setup in the basement. Here are my first results. It'll also likely be my last food results as these were the last of my baracudas... I just seem to constantly be running out of baracudas... Uhhhhhg...

I have various other pellets. I'll see how they stack up.

Top left, traveling down them right.

#1 is zeroing, then I shot on the bull on each target for the remaining shots, then second picture is the last 3 pellets into #3.

I'd say I'm onto something.

Oh, right. 18 yards.
My targets are always 3" with 1" rings.


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PostPosted: Sun Aug 26, 2018 1:54 pm 
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More.

Using the two pellets pictured and results written on the paper.

Neighbours be damned, I'm going outside to shoot the 30 yard....


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PostPosted: Sun Aug 26, 2018 2:48 pm 
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Back yard, about 28 yards.
Premier 14 grain domes left and below, jsb 25 right top. Then I ran out of time.
Top left was first. Figuring stuff out. I was ground resting on the tripod bag. I had it fully extended on top left. Lowered it down lower for bottom left. Pretty good for a bit of a rush. One unexpected flier and a pull. Then tried the jsb to right. Ran out of time before I could really see what was going to happen.
I think this is looking pretty good... I'm going to order some jsb 18.1's. those premiers are just cruising down range quick times. You can hear the heavier jsbs just labouring their way down. Considerable difference in impact time.


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PostPosted: Sun Aug 26, 2018 3:12 pm 
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I'm really optimistic about this because premiers have always been pretty squirrelly in this rifle. So, with more baracudas or even some jsb's (both pretty miserable in the price department...) I'm hoping to see some good stuff now.

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PostPosted: Tue Aug 28, 2018 9:26 am 
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I'd say I was there...
Now what? Lol. The journey is basically over.
I suppose I could start stretching its legs and go further. But less than an inch at 20 yards from a Chinese gun? Should I really expect better than that?


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PostPosted: Tue Aug 28, 2018 10:07 am 
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Location: Thunder Bay,On.
Great job....I would have to consider you MORE than just an average tuner...that's pretty detailed work....myself...I'm just a tinkerer/tuner.....For the barrel block...I merely replaced all my plastic washers in all 7 crosmans with resized brass ones and as usual I tuned the other areas of the gun...I find it sufficient for long range accuracy (for airguns anyway) when can plinking...Only had one gun from the factory with bad wobble but I did all the guns up anyway...just to be sure..I don't know if you have buttoned any of your pistons but I just finished rebuttoning my piston a different way...I machined a groove right around the whole front of the piston and sized in an o-ring and 3 drilled buttons in the back..plus the recently installed gas ram, brass washers, etc....wow...a new definition of smooth....It doesn't even sound like there's ANY metal parts in the gun..lol..really nice...So Im starting today on fitting a front o-ring on ALL the guns....really works great.Anyway...good job... :D

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PostPosted: Tue Aug 28, 2018 10:15 am 
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Carpenter84 wrote:
I'd say I was there...
Now what? Lol. The journey is basically over.
I suppose I could start stretching its legs and go further. But less than an inch at 20 yards from a Chinese gun? Should I really expect better than that?
Awesome!!

And you also proved that your scope is good and nothing to be blamed then!

'That's amazing...' I can't stop thinking about this words...

Sent from my LG cellphone

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Future AA ProSport
HW30/35
2240+14" barrel
Camo Chaser long barrel rifle kit
P3+2x20 Kit Scope
HW40+Extender
HW45+Grip panels from Russia


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PostPosted: Tue Aug 28, 2018 1:01 pm 
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Location: Rocky Mtn Hse Alberta
Well done
Now you need a two stage trigger.

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