I've owned 2 Sciroccos, a Fenman with .177 and .22 barrels, a .22 SLR 98 carbine, 2 Evolutions (a .177 and .22), and a .177 Beeman RX (or RX2, don't recall). Still have the .22 Evolution. My thoughts and general information-
The Sciroccos were longer than I like, and the RX longer still. All others more to my liking
carbines.
All but the SLR 98 are lighter than comparably-sized (and power) springers. Cocking effort is noticeably higher than comparable springers, but firing behavior noticeably quicker and less 'buzzy' or 'twangy'. I'd describe the trigger-actions not as impressive as Weihrauch or Air Arms springers, sometimes needing
judicious adjustments, and also sometimes difficult to successfully accomplish those adjustments. Then when at their best, I'd describe the trigger-actions as only a good sporting trigger; not nearly 'match-grade'. Otherwise the actual accuracy and performance of Theoben gas-ram guns is TOP-NOTCH.
Due to their light piston weight (lacking a steel spring behind it), Theoben gas-ram guns produce higher muzzle energies with light to mid-weight pellets than with mid to heavy ammo.
They are very intolerant of dry-firing; as I discovered when also discovering the SLR 98 magazine doesn't mix well with Margaritas (resulting in said dry-fires). It is also a mistake to pump up the gas-ram pressure too high in search of velocities higher than any particular Theoben model's performance parameters; that prematurely
fries the piston seal.
I assembled related excerpts for you from my fourth book,
Airgun Chronicles- Thirty Years of Airgun Testing and Competition (copyright 2013), that presents testing of 349 airguns of all kinds. You're welcome.
View attachment 1562090625_21070996695d1b9c81cf7233.31958621_Theoben excerpt.pdf BTW,
Airgun Chronicles is no longer available, but my latest book still is (
Custom, Classic & Otherwise AWESOME AIR PISTOLS!).