As already mentioned, the HW 30/R7 design does not have cramped-up kiddie stock dimensions, so have no fear of that. If that’s the power level you need, that’s the gun you should buy.
The collector in me will toss out another option for consideration, though: the ORIGINAL HW 50 family, that was discontinued several years ago (the current “HW 50” is a very different gun, originally introduced as the HW 99).
The old 50 has the same slender receiver tube as the 30, but longer for more power. Construction-wise, the gun has the beautiful threaded-on rear receiver section like HW’s bigger guns (HW 35, R1, HW 77/97). To me it's an ideal size and weight, balances perfectly, and has the right blend of enough power with smooth shooting behavior. The gun was sold with and without the Rekord trigger; “HW 50S” denotes the latter, and is the one you want.
Best-know old 50 variant here in the US is the Beeman R8, which added a safety button, synthetic piston seal, and upgraded stock to the basic design. But the original German HW 50S is still a fine rifle. You might have to bide your time on the classifieds to find one, but they are worth the wait.
Weihrauch’s famous HW 55 target rifle uses the same barrel and receiver as the HW 50, but adds a more refined stock, a barrel lock, a slicked-up version of the Rekord trigger, and match sights. This gun was available with different stocks; the HW 55S (plain beech stock) or HW 55M (traditional Bavarian-style walnut with cheekpiece) also make fine all-round rifles.
Parts for these guns are still readily available, and both Maccari and Vortek offer a variety of upgrades.
Here’a photo. Top to bottom is a 1950’s HW 50 with deluxe stock and pre-Rekord trigger; an HW 50S from the 70’s with Williams aperture sight; and an R8. While the R8 is VERY nice indeed, the plain-looking, leather-sealed, no-safety 50S is the one that handles and balances like it was custom-built for me.