Consistency of springer muzzle velocities

[Antoni]

Hi Antoni,
The inside of your gun should look clean but not dry, the piston & spring should have a light smear of grease & the piston head a thin smear of silicon oil.
I hold my combro on with elastic bands.
Your velocity will depend on which calibre you're using.
.22 weighing about 14.3 grains will be around 600ft/sec & .177 weighing about 8.5 grains will be around 775ft/sec.
Hope this helps.

Thanks both.


Didin't know how to describe dry. Not Drizabone, no. But not wet and oily either. It looked sensible and I didn't add anything.

I'm not getting anything like 2.4 sd with my 177, hence the question. Iwas curious as to what folks thought normal for a springer, and I have a start, thanks.

[18 Wheeler]

If your HW80 is new then it will take 1000+ shots to stop dieselling and settle down. I'd consider a strip and relube.

If it's second hand then again you don't know it's history so a stripdown would allow you to check it over and lubing it should give good consitency assuming the basics are sound (Spring, piston seal, breach seal and no damage).

My 97 is tuned which clearly helps, but I recently bought a HW30 second hand and over the chrono with JSB RS (Falcon Acc Plus) the chrono readings gave a 3fps spread (6 readings were 676fps), that could be a freak data set with all the variables working for me.

It was only a 12 shot string because by then I had got all I needed to know. Legal, yes. Consistent, yes.

I would expect most springers to give 15fps spread or less with a pellet it likes, and the SD will probably be sub 5. Don't get too hung up on this though, what's the accuracy like?

[jay.t]

Thanks both.


Didin't know how to describe dry. Not Drizabone, no. But not wet and oily either. It looked sensible and I didn't add anything.

I'm not getting anything like 2.4 sd with my 177, hence the question. Iwas curious as to what folks thought normal for a springer, and I have a start, thanks.

You've not told us what readings you are getting, single figure spreads are great but even 20+ spreads may not show up when shooting on paper

[FPoole]

I like my TX's to run around 10 fps total spread in 10 unweighed shots. They don't always do this, but usually are close. I have one that will shoot as close as 4 fps spread with a SD of 1, but again not always. I tried a HW97 recently intendidng to buy. I put it over the chrony with Crosman Premiers and found it had a 2 fps spread in 20 pellets. Simply amazing and I had to check the chrony several times to see if it was working with so many pellets running the same fps. The only problem was that with a 1,000 shot practice over a weeks time, the gun simply would not group better than 1" at 25 yards. Many groups were much worse and all pellet types I tried showed the same results. I didn't buy the gun.