I should add that it is probobly worth it to try Brenneke KO's & Brenneke Heavy Field Short Magnums or Black Magic Short Magnums. All are on the much more affordable side and you might be very happy with the results.
And the mags hit like sledgehammers.
http://www.brennekeusa.com/start.html
http://www.brennekeusa.com/start.html
http://www.brennekeusa.com/start.html