HW50S/HW99 in .20 cal

[jusanothajoe]

Anyone have a guess as to the velocity difference between a HW95 and a HW50 both in .20 and stock form?

No guess owning a stock R9 .20, same rifle. Bear in mind I was shooting the JSB heavy 15.89gr and they were the only ones chronied but I got a 631fps 10 shot average for a touch over 14 fpe. The fps numbers would/should be higher with lighter weight pellets.

Steve, don't you want to get in on one of these .20's ?
You better not wait on me to sell you mine 

[Mark 611]

LOL!!! yep! naysayer! these guns are not meant to be power houses, but efficient for the power plant size! which they are! say what u want! I already have the proof for the pudding! with my converted .20al 50! the video I posted will give all the creditable info on this type of set up from HW! the SFS JACK SNIPE! nuff said

[Mark 611]

Also the advantage of a smaller light weight rifle in the 50 makes it more viable especially shooting off hand!

[SteveP-52]

Anyone have a guess as to the velocity difference between a HW95 and a HW50 both in .20 and stock form?

No guess owning a stock R9 .20, same rifle. Bear in mind I was shooting the JSB heavy 15.89gr and they were the only ones chronied but I got a 631fps 10 shot average for a touch over 14 fpe. The fps numbers would/should be higher with lighter weight pellets.

Steve, don't you want to get in on one of these .20's ?
You better not wait on me to sell you mine 

He did ask about stock velocity on a stock 95/R9 .20 so I piped up having one...lol. I won't naysay the 50's not owning one, Mark and we have you with your HW50 .20 to provide numbers on what it should be capable of to compare to my stock R9, just wish I'd chronied the lighter stuff when I tested those new JSB heavies. Drop 4grs of weight and I'd like to think the numbers would easily be 700ish.
As far as buying one, I'm living on disability and only getting about 50% of what I make working so for now gotta be careful with money and watch what I use the credit card for.

[fwbsport]

Anyone have a guess as to the velocity difference between a HW95 and a HW50 both in .20 and stock form?

HW98 .20 from AOA gets 777fps with JSB Lites.  That's an AOA chronograph.

[SpiralGroove]

Anyone have a guess as to the velocity difference between a HW95 and a HW50 both in .20 and stock form?

HW98 .20 from AOA gets 777fps with JSB Lites.  That's an AOA chronograph.

Hey John,
Not to second guess you, but that seems awful high for an OEM HW98/95/R9 -> were talking 18.4 FPE out-of-the-box (JSB 13.73). 
That would even be on the high side for H&N 11.42's -> 15.3 FPE.

[Mark 611]

Kirk, all the lube on top of the piston seal from the factory will cause false number out of the box until it burns off! and by then the seal will be cooked! this why these rifles should be test fired only and taken apart and cleaned out a lubed properly

[fwbsport]

Anyone have a guess as to the velocity difference between a HW95 and a HW50 both in .20 and stock form?

HW98 .20 from AOA gets 777fps with JSB Lites.  That's an AOA chronograph.

Hey John,
Not to second guess you, but that seems awful high for an OEM HW98/95/R9 -> were talking 18.4 FPE out-of-the-box (JSB 13.73). 
That would even be on the high side for H&N 11.42's -> 15.3 FPE.

Yeah, I'm checking on it.  I just checked my velocity readings for the HW95L .25 using JSB Kings in Arizona:

Velocity is listed as 501, 513, 512, 519, 518 fps for five shots in THAT order! 
The Average is listed as 512 fps
The Low is listed at 501 fps
The High is listed at 519 fps
The Extreme Spread is listed as 18 fps
The Standard Deviation is listed as 7 fps

This system can be compared evenly to my HW98 .20, and my HW95L .22.  I'll get those and post them with all the HW98 .20 numbers too.

[SpiralGroove]

Kirk, all the lube on top of the piston seal from the factory will cause false number out of the box until it burns off! and by then the seal will be cooked! this why these rifles should be test fired only and taken apart and cleaned out a lubed properly

Yeah Mark,
I've never had one diesel like that out-of-the-box, but definitely after one of my tunes for a few shots.
I think John got test reports mixed up or something .

[Mark 611]

That goop HW uses in their rifles sometimes doesn't smoke but u can smell it, any lube in front of the piston seal is added fuel! air gun pistons work like a diesel engine piston, friction and fuel and compression go bang! They use to be very over lubed were talkin serious, the parachute groove would be packed full and the face of the seal caked with lube! this is why anybody who shoot like we do need to disassemble these rifles and clean them out! HW builds these rifles with the mind set that an average air gun user shoots about a 100 pellets a year, and the way they set them up and an average usage these gun will last someone a life time as they are out of the box! you take guy's like us who shoot 2x that in a sitting everyday or a few times a week, it doesn't take long before you have broken the spring or burned up the piston seal! this accelerated usage of the factories intended use of the rifle in its factory state, This why aftermarket springs and seals exist, If ur gonna build a hot rod engine for ur car I doubt ur gonna OEM parts

[Mark 611]

Kirk, if ur getting dieseling after u cleaned it all up for a few shots its probably the cleaner or solvent u used to clean it with, sometimes they can leave a film or residue behind, heating it up with the piston friction will cause it to burn off, due to a low flash point of the solvent or cleaner, to much molly on ur piston seal will cause the same thing

[spevie]

Is it possible to switch barrels between an R7 .20 and a R50S .177?

[jusanothajoe]

Is it possible to switch barrels between an R7 .20 and a R50S .177?

I don't think so, because the R7 has a ball detent, and the hw50 has a chisel detent.

[SpiralGroove]

Kirk, if ur getting dieseling after u cleaned it all up for a few shots its probably the cleaner or solvent u used to clean it with, sometimes they can leave a film or residue behind, heating it up with the piston friction will cause it to burn off, due to a low flash point of the solvent or cleaner, to much molly on ur piston seal will cause the same thing

Yeah Mark,
I use SuperLube w/PDF to lube the compression chamber, as recommended by CDT.
I think some of it gets ahead of the piston seal when the piton slides into the compression chamber.
There's only one or two "crazy velocity" shots -> so far no burned seals .
I would either need to reduce my SuperLube applications of go with something non-combustible.

[AjaxTL]

I missed the group buy by a long mile.  If anyone chooses to part with theirs I would be interested.

[DanD]

You can still call and special order them from AoA.

[Yogi]

I have the HW 50 in all the calibers.  I find the .20 much superior to the .22.  The .20 caliber adds about 10-15 yards to the effective range.
The .20 pellets weigh almost as much as "normal" .22 pellets and go 30-50 fps faster.
One of these days I will sell my .22 barrel.

-Y

[Guzziman]

Well,

I can’t believe it’s over 2 years since I started this thread with the thought of building the ultimate HW50S.  It was a dream at the time to get one in .20 cal. Since then, Airguns of Arizona came to the table and made buying complete guns and parts a reality for us here in the USA. 

Thanks to Yogi’s recent post, I was reminded of this old posting and decided to call up AofA. They actually had one last .20 barrel for the 50S in stock!  The guy said it wasn’t stored properly by the last guy, had a minor mark on breach block and he offered it to me for $25 off. That was my lucky day, for $100 my old dream is about to become a reality.  The barrel was wrapped well and got to Michigan in a couple days. Last night I stripped my 2006 vintage 50S, cleaned it out relubed the TBT kitted and newer factory spring and installed a new Green Aussie seal,  according to Mark these seals are fantastic. The Vortek vac seal was kept as backup.

I ordered 1000 FTT .20 11.42g pellets the same day from pyramid air. Today or tomorrow hopefully I can test and chrony this thing. My original .177 barrel was really good, I can’t wait to try this .20 out!

My barrel had the following inscription on bottom:

A09908
2018-DE

I am guessing that this barrels must have been made in 2018 when Tony at Sandwell in the UK special ordered his guns. Anyone know what this code means.

Will keep you all posted on the outcome.

Guzziman

[Mark 611]

Yep, that's December 2018! when the barrel was made, I also appreciate you reading my input on these rifles and using some of my suggestions on parts or seals

[Yogi]

FWIW-My HW 50s In .20 cal shoots the H&N 11.42 right at 12 fpe.
They require a push to seat them.  The JSB's require even more effort to load.

-Y