Corrected entry: In the 2nd Tremors film, there's a scene towards the end when Burt uses his LAR Grizzly Big Bore .50 BMG rifle on a shrieker, and the .50 cal round reduces it to spaghetti sauce. However, in this movie, Burt uses a .50 cal round to handle the Shriekers in Argentina (in the very beginning), and this time the bullets only cause bullet holes, and not massive carnage.
Hector23
22nd Apr 2012
Correction: Burt makes his own bullets, as shown in the first film, and as such he can control how much powder goes into them and therefore how much kick they have. Not to mention whether they're hollow point or full metal jacket; that alone could account for the difference between "spaghetti sauce" and simple penetration.
Phixius ★