• Jefferson State Airrifles
  • Air Gun Web - Expert Airgun Reviews
  • Hajimoto Productions
  • Airgun Angie - Backyard Shooting
  • Nielsen Specialty Ammo
  • Dynamic Air Rifles
  • FX Airguns
  • DonnyFL - When silence is a priority
  • Airgun Archery Fun
  • Pyramyd Air
  • Saber Tactical
  • New England Airgun
  • Umarex Airguns
  • Contact us
  • Utah Airguns
  • SEKHMET Airgun Accessories
  • Freedom Gun Targets
  • Evanix Airguns at Airgun Pro Shop
Jefferson State Airrifles
Air Gun Web - Expert Airgun Reviews
Hajimoto Productions
Airgun Angie - Backyard Shooting
Nielsen Specialty Ammo
Dynamic Air Rifles
FX Airguns
DonnyFL - When silence is a priority
Airgun Archery Fun
Pyramyd Air
Saber Tactical
New England Airgun
Umarex Airguns
Contact us
Utah Airguns
SEKHMET Airgun Accessories
Freedom Gun Targets
Evanix Airguns at Airgun Pro Shop


Author Topic: Hatsan PCP rifles - How many useable shots per fill?  (Read 8285 times))

Offline Craymar

  • GTA Senior Contributor
  • ******
  • Posts: 2036
  • yes
  • Real Name: Charles
Hatsan PCP rifles - How many useable shots per fill?
« on: April 15, 2012, 02:38:23 PM »
Looking at the Hatsan specs they claim 60-70 shots per fill on most their rifles and Hatsan don't normally fudge numbers. The BT65 RB for example claims 1070 fps in .25 cal. with 65 shots at 200 bar.  I know there is a power curve, but how many usable shots do they get?
  • Savoy,Tx
HW97K .177 Blue Laminate 
BSA R10 MK2 .22
Walther LGV Competition Ultra .177
Walther LGU Varmint .22
Walther Terrus .177
Airforce TalonP -.25 Escape
Crossman MTR77NP
Discovery .22
Hatsan 125 Sniper .22
RWS 48 .177, Vortek Tune kit (1994)
Cometa Fusion Premier .22
Gamo Shadow 1000 .177 (CDT trigger)
Benjamin 397PA .177
Sheridan Silver Streak .20 (1979 C Series)
Sheridan Blue Streak .20 (Rocker saftey)
Benjamin Trail NP .22 (CDT trigger upgrade)
Winchester 850XS .22

Online Ribbonstone

  • GTA Senior Contributor
  • ******
  • Posts: 11080
Re: Hatsan PCP rifles - How many useable shots per fill?
« Reply #1 on: April 15, 2012, 03:12:56 PM »
Define "useable".

IF you count how many shots that manage to dribble out the barrel in the general direction of the target, then it is probably much more than 70 shots.

If you count only the number of shots that are within 3% (or a more liberal 4%) of max. velocity, then it will be a whole lot less than 70  shots (and they do not advertise 70 shots for the .25 versions...forget the number, but its less than 70).

There is some adjustment built into the system (is kind of hidden and hot really adjustable unless taken out of the stock, but there is a spring tension adjustment).  How low you have it adjusted to shoot changes the shot count as well, but lets consider the expected real-world numbers from an out-the-box Hatsan PCP.

Will use this calculator for estimates:
http://calc.sikes.us/1/index.php

IF you plug in 3000 start fill and 1900 as the end pressure (a pretty liberal pressure range)
180cc as the volume (although they make long tubed versions as well as the standard 180cc tubes)-
use 26gr. as a "average" .25 pellet and use 850fps as the velocity.

Can keep plugging numbers for the shot count into the equation until you get a bar-cc/fpe efficiency rating of about 11 (which is a pretty good efficiency).

Doing that, come up with 28-30 shots.  From past experience, that would probably be the best real-world shot count within a reasonable velocity variation (meaning a variation low enough that you wouldn't notice the shift in vertical at short ranges like 25yards).

.177 Example: a simple Pneuma, but from what I can tell, all the PCPs use the same valve system so it could be useful to other models.  Has been farted around with and adjusted, but running on stock parts.



IF you keep to 4% of max, then could count 60 shots inside of 4%'
IF you keep to the 3% max, then about 48-50 shots.

NOTHING adds to shot count like OVER FILLING.  Once you get close to valve lock, it takes an amazing number of shots to bleed off enough air to let the gun get back up to normal speeds.  Once overfilled this gun by 35 BAR (not over MAX pressure, just over the pressure it had been set to run at) and it took me 60 shots before it got to the expected curve...while they were not "useful" shots in that they shot way-way low, could count them as "shots" and claim 150-175 shots per fill for the same gun as above.


« Last Edit: April 15, 2012, 03:24:11 PM by Ribbonstone »
  • Louisiana

Online rsterne

  • Member 2000+fps Club
  • Bob and Lloyd
  • GTA Senior Contributor
  • *****
  • Posts: 25025
  • GTA Forums Person of the Year 2017
  • Real Name: Bob
Re: Hatsan PCP rifles - How many useable shots per fill?
« Reply #2 on: April 15, 2012, 10:46:32 PM »
I had a stock .22 cal Hatsan AT-44 and for 30 shots (3 clips) the total velocity spread was 6-7% depending on pellet weight.... Within a 4% window, it got 23-26 shots between 26-33 FPE depending on pellet weight, with the heavier pellets producing more energy and more shots.... That worked out to an efficiency of 0.93 - 1.20 FPE/CI, with the heavier pellets being more efficient....

I know of a modded BT-65 in Canada shooting about 70 FPE with EunJin 43 gr. points.... but I think the shot count is about one 9-shot clip at that power.... I don't know what the "good" shot count is for a stock .25 cal.... but the BT-65 has a larger reservoir than the AT-44.... It should, it's a couple of lbs. heavier, at about 9 lbs. without scope....

Bob
  • Coalmont, BC, Canada
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).