Air Gun Home :: View topic - Factory settings for Benjamin Marauder .177?

supercharged86 · Member

Does anyone know what the factory settings would have been for the hammer spring preload, hammer stroke and the velocity metering screw? Thanks. Steve

sniper · Silver Status Member

i don't know. i don't believe the book says.

adjust everything down yourself then count the turns?

i'd just send crosman an email. i've had good response in the past.

supercharged86 · Member

Well the reason I ask is because when my rifle arrived last week from A.O.A., the set screw that covers the velocity metering screw was missing. And when I contacted them to see if they may have changed something before shipping they couldn't tell me for sure if they had. This is not to say that it didn't leave Crosman without the set screw.

After referring to the manual the velocity adjuster screw will bottom out with a maximum of 4 1/2 turns out, however, it sounds lilke the hammer spring preload and stroker adjusters will not bottom out (found on page 8), so therefore, how do you know where the starting position is?

Thanks

sniper · Silver Status Member

ooooooh that's a hard one.

i'd send an email to crosman's tech department.

do you have a chrony???

what i can tell you is out of the box mine was peeking at 785 fps with kodiaks at 1800psi.

i've opened my velocity adjuster (nothing else) 1.5 turns out now i'm at 802 fps peeked at the same 1800 psi.

i haven't adjusted anything else because my scuba tank won't do a 3000psi fill.

sorry i can't help more. Rolling Eyes

supercharged86 · Member

Yes, I have sent them an email and still awaiting an answer. I'm using a Shooting Chrony Beta model chronograph with lighting. Here's some shot data as the rifle stands out of the box with no adjustments:

3000 psi starting fill
Crosman Premier Ultra Mags 10.5 gns

The best results of 7 strings of 10 were #4,5 and6:
#4 yielded 892 lo, 907 hi, 897 avg. 2700psi start 2600 end
#5 yielded 899 lo, 907 hi, 903 avg. 2600 psi start 2500 end
#6 yielded 884 lo, 905 hi, 894 avg. 2500 psi start 2400 end

#1 was the worst at an avg. of 810 with the 3000 psi start 2900 end (I'm guessing due to valve lock.

The metering screw is set at one half (1/2) out from bottom

It seems to be pretty consistent at using 10psi per shot and it did this for 70 straight shots

sniper · Silver Status Member

doh, it's been a stressful day. Mad

my mrod is .22.

there are a couple members here with the .177. hopefully one will
chime in.

aside from that. awesome rifle huh? Cool

i have that same chrony. love it a lot. Cool

supercharged86 · Member

Ooops, little correction on the velocity metering screw setting, it's two and a quarter out (2 1/4) not a half.

I've found some articles on the Crosman site where they mention factory settings and optimum settings for the Premier 10.5's. Looks like the preferred setting is 800-850 fps for the best accuracy, I guess I'll have to detune mine or reduce fill pressure.

Yeap, love this rifle and the chrony too. Too bad this damn printer seems to be troublesome. I've already had two in two weeks, both with the same problem.

sniper · Silver Status Member

remember. the highest accuracy and power is with the most heavy pellet at a modest velocity (under 900fps IMO)

what are you using for the max fill, tank or pump?

on my .22. i'm getting 710 fps peaked with 28.4 eun jins. that's
32 fpe@1800 psi. Shocked

Teryx · Veteran Member

supercharged86 · Member

supercharged86 · Member