RE: H S Strut undertaker choke .665
You won't know till you try. Several buddies of mine and myself all have Browning BPS 3.5" 12 gauges. We all tried different chokes until we found one that our guns liked. This approach saved us some money since we each did not have to buy as many chokes. The choke that patterned the best was the Rhino(80 bucks) but the choke that suprised us all was a Star Dot(19.99) from Wal Mart. The Star Dot performed really well and cost 1/4 of the price of the Rhino. The difference in the two seemed to be in construction with the Rhino being much heavier constructed and it just looked to be of better quality(in terms of lasting ability).
If you know some people who have turkey chokes for the type of gun you are shooting ask to try them out. Most people are more than happy to show you how great their chokes perform.