RWS 34 Power

That seems a little low but not too bad. Your probably thinking of Vortek spring kits. I have one in my Diana 34, 2015 model, and I'm getting 700fps with 15.9gr pellets.

With your year model and a JM GRTkit using 14.3g averaged 715fps for at least 2 years. I think your a bit low. If ordering just a spring from JM do spend the extra $1.00 to "set" the spring for you.



John

sounds a little low ,mine is just about like the r-9 in power

the t06 ones shot around 650 for me - i reckoned due to choked barrel. but the t01 verions i have had got just over 700 (715-ish). yours probably has some spring fatigue, or someone could have left it cocked too long. tom gore (vortek airgun products) and jim macarri (air rifle headquartes) are both VERY good sources for parts to restore your d34 back to full power. i know only one guy who got 740 fps with a .22 like yours was chris pryjomski (c.a.p. airgun research) and he said the shot cycle was just too rough...... the first air rifle i ever tuned was my .177 diana 350. ray moody taught me how over the phone from alaska. ray (super6) was right - the diana break barrels are a good place for an airgun hobbyist to start because they are easy to dismantle. you'll have to figure out whose rebuild parts are better for your d34 - like both sources the same , although i find that vortek kits work best in particular airgun models , and same with macarri......that's my hands-on personal, real-time experience. ( all velocities using crosman premiers). hope that helps.

Yuup like they said. Should be about 700- 720 fps with 14.3

After my spring 'settled' I thought I would beef it up with a HO spring. It became jumpy and more hold sensitive.