HW30 FPS Low?

[Deerstalker]

Recently picked up a pre-owned HW30 that's dead nuts accurate, but potentially shooting on the low side. With CPHP's I picked up the following ten FPS readings:
452.1 | 472.4
444.0 | 457.6
421.0 | 465.2
422.2 | 492.4
460.0 | 488.4

Is this a little anemic for the platform?

IMO these are low numbers.
421 FPS with 7.9 gr pellet, FPE = 3.10. 488.4 FPS, FPE = 4.19.

 

[KWK]

If you don’t deburr the cylinder you will nick the new seal.

 

[Hateful McNasty]

Its hard to tell from the picture but the piston seal does look knicked on the left side there. Along with that the spring is definitely a bit worn. Pretty typical with how loose fitting they are on the guide and in the piston. I'd go ahead and just replace both.

I'll second the top hat as well. The ARH kit comes with one.

Ya, why i asked about the old lube. Kinda looks run a little dry / that dark ring around the seal side. Then the rest kinda looks dried out flakey so to say (???)

 

[A.G.R]

Seal is toast, burn hole on the left. Spring has lost its temper and is done its “ S “ CURVING THROUGH OUT.
VORTEK Vac seal and Pg 4 kit … make sure to linish the cocking foot so it’s flat . ARH kit will net you a softer shot cycle YMMV ..

 

[Bad News Beeman]

Its hard to tell from the picture but the piston seal does look knicked on the left side there. Along with that the spring is definitely a bit worn. Pretty typical with how loose fitting they are on the guide and in the piston. I'd go ahead and just replace both.

I'll second the top hat as well. The ARH kit comes with one.

Does the ARH kit come with a replacement piston seal?

 

[Struckat]

I coming up on 10k rounds through mine and still have the original seal.
My spring took a banana set by 4K rounds. I replaced the spring with a Vortek and it is still going strong. I do have the Vac seal waiting in my inventory. I like the Vac seal much better than the OEM style parachute. But then I am only a novice and have fitting a seal only once. The Vac seal does not require fitting.

I would defiantly get a new seal.

Mine shot 7.9 @650 out of the box and still today.

 

[Sqwirl57]

Does the ARH kit come with a replacement piston seal?

No it does not but he does sell a seal separately. The seal will need to be manually resized whereas the Vortek seal tends to resize itself (but not always!). I prefer the Vortek seal

 

[Hateful McNasty]

Get the spring and seal

https://www.airrifleheadquarters.com/catalog/item/251485/1381148.htm


https://www.airrifleheadquarters.com/catalog/item/251488/2322114.htm

The seal may need fitting and the spring fits the gactory guide in your gun .

Also you can ask if he got a set spring . Not a big deal but van make install a tad easier .. like pushing on the guide and compressing ..

Then as a backup get the vortec seal squrl suggested above ..

Then you got 2 seals to play with and try .. maybe get 2 arh seals and practice fitting one in / gain that experience.. have the vortec as a backup drop-in ..

I usually get 3 arh seals to play with or Incase of my common opps moments

P.s

Dont forget the moly if you don't gots

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Maccari Custom Airgun Shop. Airguns and related accessories. Springs,tune kits,gunstocks,Beeman, Rws, Webley and many others. Sales and service

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[Telephonepete]

Top hat may not fit in.

 

[MDriskill]

Dumb question...have you tried other pellets? Yours does indeed seem on the slow side, but I've never gotten particularly good speed or consistency out of Crosman pellets in HW rifles. My old R7 loves 7.3 JSB Exacts FWIW.

 

[Bad News Beeman]

Belated update here: FInally got around to replacing the main spring and piston seal with new parts from ARH. Used some TbT bum-slide on the spring and piston as well.

Seems to have done the trick. I was able to get out with the chrony today ahead of this upcoming Hurricane Hillary nonsense and here's what my HW30 is producing now:

589.8
571.5
580.9
563.9
584.5

About 100 fps higher than before, and these numbers seems more in line with factory specs velocities.

 

[Leon83]

My HW30s shooting H&N Field Target Trophy 8.64gr, equipped with pg4 vortek kit
202 m/s —> 663 fps

 

[Bad News Beeman]

Wow, that Vortek kit is really something else. I may swap one in later, but having been my first Weihrauch reseal attempt, I just opted for the standard parts.

 

[jlharden]

A tin or so through a PG4 kit/Vortek seal on a newer HW30. I didn't chrony the 8.64 FTT as it's on the cusp of being heavier than I would use at that power level. I did shoot a variety of JSB stuff from 7.33 to 8.44 with results landing in the 8.1-8.2 range, give or take. It's a tack driver. Would not push for more on that platform though.

 

[Deerstalker]

My HW30s shooting H&N Field Target Trophy 8.64gr, equipped with pg4 vortek kit
202 m/s —> 663 fps
View attachment 382062

FPS = Feet Per Second, MPS = Meters Per Second, FPE = Foot Pounds of Energy.
To convert to Joules multiply FPE by 1.3558, Joules to FPE multiply by .7376
To convert MPS to FPS, MPS x 3.2808399 = FPS .
To convert FPS to MPS, FPS x .3048 = MPS.
FPE Formula is Pellet weight (gr) x FPS x FPS divided by 450240 or 450436.7.
450240 is 2 x velocity of gravity x 7000, (2 x 32.16 x 7000 = 450240)
450436.7 is 2 x velocity of gravity x 7000, (2 x 32.17405 x 7000 = 450436.7)
The constant 450240 or 450436.7 depends on which value you use for the velocity of gravity.
32.16 ft/s/s or 32.17405 ft/s/s. There are 7000 grains in one pound.
The difference does not matter which ever constant is used for the FPE calculation.

 

[Mycapt65]

A tin or so through a PG4 kit/Vortek seal on a newer HW30. I didn't chrony the 8.64 FTT as it's on the cusp of being heavier than I would use at that power level. I did shoot a variety of JSB stuff from 7.33 to 8.44 with results landing in the 8.1-8.2 range, give or take. It's a tack driver. Would not push for more on that platform though.

View attachment 382326

View attachment 382327

Beautiful rifle. I completely concur about pellet weights for that gun. Along with being a little heavier than the JSBs the FTTs have stiffer skirts and tend to fit tighter. I feel that taxes the little gun. You'll see the power output drop with FTTs kind of confirms that. I mostly shoot JSBs 7.33 and 8.44s through my 30s. RWS 8.2 MK wadcutters shoot well too. The 7.33s see most of the action.

 

[Leon83]

Wow, that Vortek kit is really something else. I may swap one in later, but having been my first Weihrauch reseal attempt, I just opted for the standard parts.

I did not updated pellet weight in Fx radar app, energy at the muzzle should be ~11.4J —> 8,4 ft-lbf.

 

[jlharden]

Beautiful rifle. I completely concur about pellet weights for that gun. Along with being a little heavier than the JSBs the FTTs have stiffer skirts and tend to fit tighter. I feel that taxes the little gun. You'll see the power output drop with FTTs kind of confirms that. I mostly shoot JSBs 7.33 and 8.44s through my 30s. RWS 8.2 MK wadcutters shoot well too. The 7.33s see most of the action.

I concur. I've had very good results with the JSB 7.87's as they land right in the middle of that 7.33-8.44 sweet spot. They all like something a little different though. And that doesn't always translate between different tins and dies!