FX .22/600mm FX DRS Classic - a couple of stats...

Jump to latest Follow Reply
Vana2

Vana2

Member
May 11, 2015
1,012
1,159
Ontario, Canada
I'm just getting past the break-in period (about a tin of pellets) with my .22/600mm DRS and starting to look for the best pellet. Looks like the factory tuned to an 18g pellet.


Thought I'd share the numbers for anyone curious about the stability FX DRS.

JTS 18.1g -
A 911fps
H 914
L 910
ES 4
SD 1.7
FPE 33.3
GROUP (5 shots, 40 yards) .358 CTC

AA 18.0g -
A 916
H 919
L 914
ES 6
SD 2.2
FPE 33.5
GROUP .332 CTC

JSB 18.13g -
A 917
H 921
L 915
ES 7
SD 2.7
FPE 33.8
GROUP .338 CTC

I found that my DRS groups best with a light/loose hold.

Cheers!
 
Vana2 said:
I'm just getting past the break-in period (about a tin of pellets) with my .22/600mm DRS and starting to look for the best pellet. Looks like the factory tuned to an 18g pellet.


Thought I'd share the numbers for anyone curious about the stability FX DRS.

JTS 18.1g -
A 911fps
H 914
L 910
ES 4
SD 1.7
FPE 33.3
GROUP (5 shots, 40 yards) .358 CTC

AA 18.0g -
A 916
H 919
L 914
ES 6
SD 2.2
FPE 33.5
GROUP .332 CTC

JSB 18.13g -
A 917
H 921
L 915
ES 7
SD 2.7
FPE 33.8
GROUP .338 CTC

I found that my DRS groups best with a light/loose hold.

Cheers!
Click to expand...
Nice shooting. AEA 18.3,s are also great pellets. They group fantastically in my guns.
 
  • Like
Reactions: Bud-sc and Vana2
Upvote 0
Footloose said:
My .22 600 Is getting around the same stats , How many shots per fill are you getting ? Im only getting 2 mags before It starts to drop off which Is a little disappointing . I just ordered the SHP plenum kit hopefully when tuned will give me more shots .

Thanks .
Click to expand...
I'm getting around 33 shots on a fill.

When compared to a couple of other my PCPs with tube reservoirs, (considering the reservoir volume, and fill pressure) that's pretty much what I expected. Overall I'm happy with the performance of the DRS.

I bought the DRS as a light weight squirrel rifle so shot count was not the prime consideration. Typically, I'll only take a pair of squirrels for the pot and leave the others for another day so it's two shots and I'm good 😉 (my shooting would be really bad if I run out of air 😳)

That being said, I'm planning to detune the DRS (from JSB 18.13/33 FPE) to a lighter pellet and 15ish FPE - mainly to quiet the gun down (as moderators are illegal in Canada) and that should gain me some shot-count as a bonus.

When doing a lot of plinking I use a bottle gun like a Crown which has almost double the air capacity.

Cheers!
 
  • Like
Reactions: Footloose
Upvote 0
msg1979 said:
How do you guys tune it?

On the hammer alone (fixed reg setting) or do you tune one the reg + hammer?
Click to expand...

Some PCPs ( like my AirArms S510, Daystate Wolverine, Weihrauch HW100) require deep disassembly and/or replacing parts to make adjustments, the DRS doesn't.

The DRS lacks the convenient external access of the other FX PCPs but the adjustments easily are available if you remove the stock.

Cheers!
 
Upvote 0
Vana2 said:
Some PCPs ( like my AirArms S510, Daystate Wolverine, Weihrauch HW100) require deep disassembly and/or replacing parts to make adjustments, the DRS doesn't.

The DRS lacks the convenient external access of the other FX PCPs but the adjustments easily are available if you remove the stock.

Cheers!
Click to expand...
Yes. Im aware of that 😊
But how is it best to tune? With hammer and fixed reg setting or with reg + hammer
 
Upvote 0
msg1979 said:
Yes. Im aware of that 😊
But how is it best to tune? With hammer and fixed reg setting or with reg + hammer
Click to expand...
The ""best" way depends on personal preference 😉

My approach depends on the PCP and what I want to accomplish.

If velocity is close to optimal for the pellet I want to try, I'd start by backing off the hammer spring and then increasing a bit at a time watching for stable flight, good groups, good (consistent) Extreme Spread and Standatd Deviation numbers. Pretty much in that order of importance.

If I'm making major changes to a PCP I know I consult my notes and make an educated guess as to what regulator pressure to start with and, starting low hammer, search for the best tune (same as above). Without direct experience with that particular model I might research or ask for suggestions.

If, with a new PCP, I'm tuning for a substantial change (from current settings) in performance or projectile weight then I prefer to "fingerprint" the airgun and graph the curves to see how the power plant is reacting to the adjustments.

By "fingerprint" I mean that I will test to find the knee of the power curve (for that projectile) for various regulator settings (usually between 100 and 150 bar) while watching for stable flight, good groups, good (consistent) Extreme Spread and Standatd Deviation numbers. By the time I'm done, I have a real good idea of what the PCP likes and where I should start from.

Fingerprinting takes some projectiles, air and time but ultimately it's cheaper and faster that twisting adjustments around hoping to luck into a good combination.

FWIW, My .22/600mm DRS is shooting very well with 18.13 JSBs.

Anyway, that's my approach. Remember, you did ask 🙂

Hope this helps!

Cheers!
 
Upvote 0
Thx

I own several pcps.
My panthera needs to be adjusted due to reg and hammer 98% of max to that reg to get 3-4 fps spread. If I only adjust with hammer on a fixed reg - spread is 30fps.
I own a DRS but barreltube has a fault - so liner is loose inside with both a carbon sleeve and with o-rings.
So I havent had an opportunity to tune it yet since im waiting for new parts.
 
Upvote 0
msg1979 said:
Yes. Im aware of that 😊
But how is it best to tune? With hammer and fixed reg setting or with reg + hammer
Click to expand...

With my Taipans I adjust the HS only. They usually shoot at an optimal speed when using heavy pellets as set from the factory. So I just check the HS for proper adjustment after marking the factory position. I can turn the HS down for lighter pellets and still have good SDs .

The Maverick I adjust for the best performance with my pellets of choice with the reg , HS and if needed hammer weight .

They are 2 different airguns to me . One to enjoy how the manufacturer intended . And one to adjust .
 
  • Like
  • Haha
Reactions: Vskuma and Dairyboy
Upvote 0
msg1979 said:
Yes. Im aware of that 😊
But how is it best to tune? With hammer and fixed reg setting or with reg + hammer
Click to expand...
Hammer alone isn’t the best idea for anything except a very small window of tuning. Call it fine tuning. Any real tuning is best done by working the reg and hammer tension together.
 
  • Like
Reactions: Dairyboy
Upvote 0
Con i 18,13 ( ma anche con i 20,83 sempre JSB) a 40 metri è semplicemente perfetta. Ho montato il plenum SHP. Da un primo test, senza modificare altro, i migliori risultati li ottengo con i 25,39 Monster mentre con i 18,13 ottengo, come è normale, tiri più alti. Continuerò con altri test. Il numero dei colpi per ricarica più i meno uguale ma la potenza entusiasmante. Devo provare soprattutto tiri lunghi.

17298573945213982653759154723672.jpg
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu