I think this is dictated by particular conditions of the field and of course personal preference. In purchasing my chokes I emailed Trulock and in a few hours I received a response from Mr. Trulock himself (which is not unusual I am told). He knows his product and offers good sound advice. Give him a try with your particulars …
I recently purchased 2 Trulock Precision Hunter chokes in Xtra-Full or .690" restriction, with intensions of using them with lead shot and for long range.
While on the phone asking for suggestions about which choke restriction to use for my application, I was told that I.M. Improved Modified was their best recommendation for "full choke" patterns with steel shot.
Give 'em a call at Trulock and they'll have the answers you need for your application. www.trulockchokes.com
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