My old Speer #10 lists their 150 gr spitzer/hollow point bullets along with their roundnose/flatpoint bullets for the 30-30, saying they don't recommend spitzers over 150 gr for the 30-30. Seems most of the folks at the NEF sites that are shooting spitzers in their 30-30's are using 125-150's with excellent results. SAAMI limits for the 30-30 are 38,000 CUP, mainly cause of the older Marlin's an' Winchester's out there. In the NEF, you're limited more by the case strength than pressure. Actually the whole thing kinda puzzles me, 'cause when you read about these dead-eye magazine writers shootin' that 97 point buck at 400 some yards
with their trusty(brand new you gotta go out an' buy one) 30 WhizBang, seems like the velocity at that range is down to around what a modern loaded 30-30 does out to maybe 150 yds, an' those folks don't have any problems with the bullets expandin' WAY out there. I've shot a couple of deer with my old 30-40 Krag loaded with 150 Speers at around 2500 fps, an ' the bullets expanded just fine. The shots were at 100 yds or less. Then there's this thing about 30-30's having weaker brass, until someone converts over to 30-30 AI, Then theey're shooting 150's at close to 2800 fps.
'Course the increased case capacity changes the internal volume some which affects the pressure, but still the ones using the AI that I've read about recently are still pushin' around 45K CUP. Apparently with no case problems ta speak of. Makes me wonder sometimes. Makes me wonder. :?