Question on advertised air rifle pellet speed. fps

So am looking to buy an air rifle and am wondering if the advertised speed is for a light alloy pellet or the standard 7-8 grain pellet? Some companies will specify but it seems like most don't. Actually I'm looking at a 22 having never had one before, just the 177's. So is it standard practice to advertise the speed with an alloy one?
 
If you are a power hungry person then the Walther Parrus 22 is 100% German and the RWS 3400 is ASSEMBLED in USA using Chinese and German parts and DOES NOT HAVE THE FAMOUS T-06 TRIGGER and you are getting a Walther type gun that's a hybrid using both German and Chinese parts FYI.

The Walther Parrus is rated at 1300fps in 177 and 1000fps in 22 using the lightest weight pellets. They are around the same price point as the 3400 give or take around $20 or so...I would personally prefer the 100% German Model 34 for the same price with the T-06 trigger or buy the $85.00 Flying Dragon Chinese clone version but that's just me.

Both RWS and Walther come with a lifetime warranty from Umarex USA just as long as they aren't tinkered with.