Review of Beeman PCP Underlever Model 1358 .22 caliber

I received one of these last Friday and after having shot it for four days, have a little information to share. My experience with Beeman products has been limited, but I have three other bullpups that cost much more than the Model 1358 and am very comfortable shooting those.

Generally, this is what I've found thus far:

1) As received, trigger pull measured 7 pounds, 4 ounces. Was gritty with lots of creep. Felt like dragging a stick on a gravel road.
2) Rifle has long first stage, and a second stage with plenty of creep.
3) Removed stock and found almost no lubrication anywhere. Lubed pins with single drops of oil and greased metal plate on bottom of action and adjacent to trigger as well as the trigger contact surfaces. Lubrication brought pull weight to 7 pounds, 0 ounces.
4) There is no way to change length of first stage pull unless threads are cut off of the trigger transfer rod. Perhaps 1/8" could be cut off, but am uncertain if that would be too much.
5) Replaced factory trigger spring with bulk pack gold-colored spring of same diameter and of smaller wire gauge. Cut to same length and installed. Average of 5 pulls using Lyman digital trigger pull gauge is now 2 pounds, 9 ounces.
6) Lots of plastic used in manufacture of this gun. Shroud is plastic. Plastic baffles are molded and attached to plastic front cap. Front cap threads onto threaded muzzle and holds shroud in compression against receiver.
7) Front receiver and front fire control assembly are plastic. Picatinny rails are plastic. Kept lubricated, the trigger and other pins in the front fire control assembly will probably not be a source of wear.
8) Found pictanniny rail and cheek piece screws loose from factory. Philips screws affixing cheek piece had incorrect screwdriver used for tightening. Slots were damaged.
9) One of two supplied magazines was defective and would not fully slide into the breech. Beeman shipped a replacement after being contacted.
10) After about 200 shots, creep in second stage is evident, but can probably be remedied by adjusting sear screw. Will wait a bit longer to allow for more wear-in before adjusting.
11) Hammer spring adjustment is via hole just below cheek piece at rear of gun.
12) Rifle is somewhat loud and wouldn't be backyard friendly for small lots.
13) Rifle seems to prefer pellets in mid-weight category. Heavy and light pellets shoot very large groups. Crosmam 14.3 grain HP and Ultramags as well as Air Arms 16 grain have shot the best. Did not try JSB 15.89 grain but suspect they will shoot similarly to the Air Arms 16 grain.
14) Have not chronographed yet and have been trying to select most accurate pellets beforehand. Shot count from 3000 psig to 1100 psig is 35 shots. (See targets)
15) I couldn't see well enough through the included Beeman 4X scope, and instead installed a 1" diameter 4 x 12 x 40 AO scope.
16) Wooden stock is well finished and mine had no blemishes.

Plastic shroud, baffle, and fill cap.1625182344.jpg


Muzzle - baffle threads on and puts shroud in compression.1625182369.jpg


Plastic fire control and rail assembly.1625182460.jpg


Beeman UL bullpup Air Arms 16.0 grain.1625182486.jpg


Beeman UL bullpup 4 pellet types.1625182551.jpg






Beeman UL bullpup RWS Superdome and Cros 14.3 Ultramag.1625182576.jpg



Beeman UL bullpup JSB 14.35 gr and Cros 14.3 gr pointed.1625182743.jpg











After shooting a bit more, I'll examine the bore with a digital bore scope. After pulling a half dozen patches through it to remove storage grease, the next several patches pulled through very easily and no rough spots were felt.

Karl
 
I have been playing with one of these Beeman Underlever guns myself. I didn't even check the trigger pull weight in mine, but I know that I keep looking to see that the safety is off!

I didn't bother with the kit included scope. Had one scope on it which just wasn't a match for the gun, and anyway it was better used elsewhere. Got a Bug Buster 3-9 which I figured would work O.K. on the Beeman. I just received that scope today, so I can continue testing out the gun. Thanks for the lubrication and spring trigger tricks.

I have only shot CPHP 14.3's with mine. Obviously grouping is impacted by the horrendous trigger. My chrono shows those coming out of the barrel at an average of 735 fps as the gun was received from the factory.

I have to keep reminding myself that this gun only cost me $249 through AOA.

I think that it will end up in the shed as a gun to be used in case of emergencies. I think it is a great hand pump candidate with a low fill pressure (3,000 psi) and small cylinder. I can put it out there in a corrosion protective bag with the pump and a couple of tins of inexpensive Crosman pellets and have it available if ever needed.
 
After shooting this rifle for a week, I've made a couple more changes:

1) First, tried to adjust the sear screw to get rid of the second stage creep, but it was bottomed out and would not allow for adjustment. This screw is an allen head M3-0.5. Replaced it with an allen head M3-0.5 x 10 mm and cut approximately 2 mm off. Screwed in until sear would not set and then unscrewed one half turn. Applied blue loctite to screw. If the top of the screw stands proud above the housing, you can't cock the gun as the stock bottoms out against the top of the screw. Took two trials to cut to the correct length. The new screw got rid of the creep.

Sear adjustment screw.1626025437.jpg


New sear screw installed.1626025468.jpg

2) Then removed the gold trigger spring I had replaced the factory screw with and cut 1 coil off and then reinstalled. Checked pull weight and it was reduced to 2 pounds, 6 ounces.

Replacement trigger spring.1626025508.jpg

3) Took pictures of internals and there may be a crack in the underlever cocking linkage just in front of the trigger. Could be a flaw in coating or just a crack from shearing when the part was stamped. I'll have to watch this closely.

Greased plate front linkage.1626025539.jpg


4) Still pondering how to allow trigger rod linkage to be adjusted.

trigger linkage rod front.1626025649.jpg


trigger linkage rod rear.1626025674.jpg

5) As currently adjusted, shooting from 2800 to 1200 psig, looks like the gun will get about 15 shots at the same POI. Hammer spring adjustment to reduce velocity may increase this to 20 shots.

Beeman 1358 BP Cros Ultramag 2600 to 1200 psig.1626025709.jpg


I did receive a replacement magazine for the defective one that came with the gun, but was sent the incorrect one. I've been in contact with Beeman again, but haven't heard back.

Karl