I have fiddled a lot with a long throated 280. SAAMI is around 3.30". Mine is 3.5 OAL with various 160's. At comparable pressure it is pretty much a 280 Ackley performance wise.
Your long 7-08 allows more powder with less crunch. Good work!


“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”.
Antoine de Saint-Exupery. Posted by Brad.