I talked with the guys at Carlson's yesterday about there choke tube for the 301 turkey 410. It's a 385 constriction and they said it would perform with the best of them. They also said if i didn't like the choke i could return it for refund.. It's about half the price of other TSS chokes and it's made in the USA... Carlson is located in Kansas.. So we will see in few weeks how it performs... It's part number 38030