If I' m not mistaken the Nitro website doesn' t recommend a choke tighter than .665
I would be hesitant about the .655 Ventilator. It could be that you are getting too tight and need to open up the choke some. I patterned my 24" Nova the other day with the factory Modified and Full chokes and was very impressed with the Remington Hevi-Shot. If I can ever get some time again I' ll photo and post results.
MS, do the Remington chokes come to fit a Benelli? or have you had your Nova refitted for RemChokes?
Ah, here it is (I printed it out and it' s laying on my desk.)
Quote:
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Tighter chokes than .665" do not improve pattern percentages to any extent and in fact begin to produce more open patterns.
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Their tightest test patterns were with the NEW HEVI-SHOT (.675" ) at 94%