Posted 25 May 2010 - 05:19 PM
+1 what Clampdaddy said. Comparing a 12/20 with chokes is a little difficult. I'd say take your 12 ga. and 20 ga. out and experiment with different chokes and loads. I know from a 1 0z. load in a 20 ga. to a 1 1/4 Oz. load in a 12 ga. there are approx. 25% more pellets. So if the pattern out at 30-35 yards has 85% of the bb's in a 30" circle the density of the pattern is huge. Different brands of shells with similar loads will change the results and size of shot will change things again. There are a lot of variables to give a definite answer. I sound like a politician. If you have screw in chokes play around with them (sound like a politician) until you get a pattern you like. I like a mod. choke or a imp. mod. in my 20 ga. for doves and for upland birds will use a Imp. Cyl.
Life Member DU, NRA, VHA,CWA, and The OF's of America.