Diana Springer Shooting Technique

Do not hold tight just hold it the same every time.
Do not rest the rifle on a hard surface.
The surface of your hand is perfect.

You’ll need to put something soft on that front rest. The best is to hold the forearm and rest the back of your hand on a front bag.

You have to try different holds and let the gun tell you what she wants.

A lot of answers will steer you in the same direction, but you gotta arrive at the recipe that works best for you. Identify and focus on the points that have the greatest influence on accuracy; fore end hand positions, firmness of fore end grip, cheek position, cheek contact pressure (lots, little, none), firmness of butt against shoulder, etc., then experiment. Absolutely resting the fore end on a firm surface will kill accuracy just as an inconsistent hold and a lot of "twang" (spring vibration) will. It's generally accepted that a firm grip is a no-no with a spring gun but I had a Beeman Kodiak .25 that had to be held very firmly to get good groups. A good starting point for anyone with a "magnum" spring gun is an aftermarket spring/guide/seal kit that fit together properly to minimize twang. Did you buy your gun new? The 350 is a powerful gun I believe should shoot 8.4's faster than 888 fps. Have you checked a string to see if the MV is consistent and there isn't something else going on? Maybe some other owners can chime in. Also try shooting heavier pellets like JSB 10.34's to see how they group. Good luck.

My RWS 350 likes the JSB Exact 10.34 gr.

Did you check out this post on springers? I suggest a heavier pellet. JSB 10.3's or H&N 10.65's work well.

Not one of my Springers will shoot with any cheek contact. After that some like a firm hold, primarily those with a sledge system. The others like a very light hold or free recoil on a bench.

I think you just go shoot shoot and shoot and you'll figure out how to do it or whats best for you ..

888 fps 8.5g dint serm too magnum and in a good .177 range . I like mine about 820-850 fps using 7.9 cphp when available.. so..??

Start by making sure all the screws are tight and the barrel is clean.

I have two TX200 .177 , one likes a tight to the shoulder the other likes loose in the shoulder , Both like the fore end in a loose fingertips not touching the gun hold . My front rest is one from Protector and has a "super Slippery cloth" that i can rest the gun directly on.

My way of shooting the 350 Magnum:
80/20 rule, I use 80 percent of the total grip strength for the grip itself, and only around 20 percent goes into the forend stock; buttpad to shoulder contact = Average force or a hair lighter.
This is mostly for off-hand shooting and general walk-around and shoot situations. (Your mileage may vary)

Final words:
It's about follow-through, while trying not to mess with the vibrations.
Go for a hold that you're mostly comfortable with, so you can do it repeatedly.

You and your Magnum, ENJOY.

Well .... Did you get the factory iron front and rear sights with that ?

There good to check any scope issues . Like looseness, busted ,slipping ,rattled....

I thought you did say the scope was turned or somthing .. looks like that mount is on backwards i guess to fit the scopes tube configuration?

If you got a known good solid holds zero scope maybe swap it out to see of things tighten up . Just irons dont lie .