HW/Weihrauch HW30 & PG4 - WARNING

[Bear-of-Grayling]

I finally took the time today to work with my new HW30. I had installed a Vortek PG4 tune kit in it last fall but never did much more than simple function check. Got it out today and over the course of a few target dots (5 shots each) I started noticing a gritty feeling in the cocking stroke. My first thought was the galling issue the 30’s are notorious for. But I have never had that problem with the installation of a sleeved tuning kit. This Vortek PG4 is my first with the new steel sleeve. Always used the nylon ones in the past. So, I removed the receiver from the stock and started examining the underside. No galling. Thank goodness. Then I noticed the Vortek steel sleeve was full of rust. Wonderful. Tore it apart and removed the rust. Not to heavy to pit the steel but quite enough to feel it in cocking stroke. Used silicone grease this time on the outside of the sleeve. The climate here is the 3rd most humid in the country. Just a warning for anyone using the PG4. Grease the outside of the sleeve thoroughly. My first time using the Gehmann diopter also. This was my best target dot of probably a dozen. 20 yards. RWS Basic pellets. One elbow on my rocking chair arm. Life is rough.

 

[A.G.R]

My .r7 in .20 cal uses a Pg4 kit. It’s a snap shot cycle with immediate pre load when bumping the barrel to cock
it’s doing 7.5 ft lbs .. I’m ok with it .. I did make sure there was clearance prior to rebuild.. It was in it when I bought it , why re invent the wheel.

 

[Sawney Bean]

I had very good luck with the pg4 kit in my R7. Not so much in my tx200.

I also got around 7.5 fpe after the pg4 with the r7.

 

[Orv]

I had very good luck with the pg4 kit in my R7. Not so much in my tx200.

I also got around 7.5 fpe after the pg4 with the r7.

What was your problem with the Vortek tune in the TX200? Mine seems to shoot very well with it, although I think the fps is a mite low in the mid 600's. Orv.

 

[Orv]

I had very good luck with the pg4 kit in my R7. Not so much in my tx200.

I also got around 7.5 fpe after the pg4 with the r7.

What was your problem with the Vortek tune in the TX200? Mine seems to shoot very well with it, although I think the fps is a mite low in the mid 600's. Orv.

 

[Sawney Bean]

The spring and guide locked up within the piston and stayed compressed until I removed the piston, (with the spring still compressed inside), from the gun and pried the two apart. I discharged the compressed spring into a bucket filled with water and plastic sheeting and ground a little off the end of the spring guide and that fixed the problem, but it was not a good experience.

 

[A.G.R]

The spring and guide locked up within the piston and stayed compressed until I removed the piston, (with the spring still compressed inside), from the gun and pried the two apart. I discharged the compressed spring into a bucket filled with water and plastic sheeting and ground a little off the end of the spring guide and that fixed the problem, but it was not a good experience.

Your one brave soul.. I’ve had them jamb and have taken devices unbeknost to man and discharged them.. it’s not fun and yes it’s dangerous.. it’s Why I prefit everything before I assemble. Every kit I make is dry fitted and tested with a dummy spring that is very light weight to make sure it fits,cocks and fires


That spring stuck in the piston taking that rear plug off must have been hairy scary, let alone pulling the piston out waiting like a Jack in the box.

 

[Sawney Bean]

Your one brave soul.. I’ve had them jamb and have taken devices unbeknost to man and discharged them.. it’s not fun and yes it’s dangerous.. it’s Why I prefit everything before I assemble. Every kit I make is dry fitted and tested with a dummy spring that is very light weight to make sure it fits,cocks and fires


That spring stuck in the piston taking that rear plug off must have been hairy scary, let alone pulling the piston out waiting like a Jack in the box.

Yeah, it definitely was, but the real scary part was removing the trigger group. Once I had the back of the rifle clear I just kept it pointed away from me and when I discharged it I had the piston clamped in a vice with the spring pointed downward into the bucket, which did a great job of absorbing the impact BTW. Just a 5 gallon bucket filled with old plastic bags and wrappers and then flooded with water did a great job of catching the spring and guide when it did fly out.

I had the action clamped in a vice throughout most of the process so the danger was somewhat limited by that.