Info:
Manufacturer/Model:
Made in Japan for Umarex,
SA177
Replica Of: Sig Sauer P226 (9 mm)
Made In: Japan
Caliber/Ammunition/Feed:
177, steel BBs, 15-shot magazine
Air Source:
CO2, 12 g Powerlet
Accessories: BB retainer cap for magazine
Recommended Pellet or BB: RWS Match Grade BBs (5.4 gr)
Weight (lb)/Length (in):
1.80, 6.80
Body Material/Finish/Grips:
metal, black,
polymer
Barrel Length (in)/Material/Rifled: 3.62, steel, no
Trigger Action:
DA only
Trigger Pull (lbs)/Adjustable: 4.5 (DA), no
Sights (front/rear):
fixed, fixed
Velocity (fps): 410
Sound Level (dB): 101
Thickness of Pellet Holder (in):
N/A
Manufactured Dates: 2010 - present
Condition/Manual/Box: 98%, yes, yes (backer card)
Serial Number:
10C02277
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Comments:
The Umarex HPP is made in Japan for Umarex.
It is styled after the Sig Sauer P226 with the only major
departure being the shape of the trigger guard. The slide and
frame of the HPP are made of cast metal giving the gun
considerable heft. The HPP uses some of the CO2
from each shot to operate its blowback function. The blowback
action, which is pretty strong, is only for effect and does not recock the gun or serve any other function in cycling the
action. The slide locks back after the last BB has been fired.
When the slide is locked, the trigger cannot be pulled.
The firing mechanism is a moving barrel design in which the
barrel, under spring tension, slams back against the valve to
release gas for each shot. The trigger on the HPP is double-action only, which means that
all the work of cycling the gun for every shot is loaded into
the trigger pull. The pull is fairly light for a
double-action BB gun. The trigger is very smooth until it gets
near the break point where it must operate the BB loading
mechanism, resulting it some roughness. This
is not as noticeable when firing the gun rapidly. To
load the HPP with a CO2
cartridge, open the CO2
compartment by pulling up and out on the bottom of the backstrap. This
removes the backstrap and exposes the CO2
compartment. Remove the magazine from the gun to uncover the
piercing screw. Loading BBs is a straightforward process aided by the
fact that the magazine has a locking position for the
spring-loaded follower. Be sure to release the follower after
filling the magazine. If the magazine is
removed before it is empty, a BB is left behind in the gun. Be
sure to shake this out to avoid jams when reinserting the
magazine. The HPP has above average power
and, using RWS BBs, decent accuracy for a CO2-powered
BB pistol with a smooth bore. Approximately 50 to 60 good shots
can be expected from a CO2
cylinder depending on how rapidly the gun is fired (rapid firing
reduces the number of useful shots). The Umarex HPP, with its
strong blowback and above average performance, is a good action
pistol for general plinking.
Performance:
Measurements were made on
6/8/10 at a temperature of 80 ºF and 14' elevation. A ten shot
string was fired from a bench rest at 15' using RWS Match Grade BBs
(5.4 gr).
The highest velocity measured was 398 fps, the lowest was 388 fps
(average of the 10-shot string was 393 fps, s = 3.0). A six shot string
fired with open sights grouped at 0.77". Click the thumbnail below to see a
larger image.
Click
here for a description of the measurement methods.

Four different brands of BBs were
tested with the HPP. The targets below show the results
for firing five-shot groups from 15' using a bench and open
sights with Crosman Copperhead BBs, Daisy Avanti BBs, Daisy
Precision Max BBs, and RWS Match Grade BBs.

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