I am sure you will find them at the convention, but if you like you can get the 3.5-2.25-7's here http://www.midsouthshooterssupply.co...NAV=3&vendors=

Quite a bit cheaper than Nitro's especially when you factor in the rebate, and if I recall correctly Environ Metal is advertising somewhere around 290 in a 10" at 40 yards for their magnum blend so the straight 7's should be even better.