I will probably get some flack about this , but here goes. My favorite load in 30-30 is 32 grains of IMR 3031 with speer 130 grain Flatnose , SP might be better in a single shot, I can shoot a 1" group with an old Marlin30-30, with a sightron scope on it.
As for the crimping , here goes. I don't really crimp my bullets , I put them in a RCBS load die, which has the built in crimper, and instead of using the press and doing a real hard crimp I set the die on a hard rubber mat with the case bottom pointing outward and tap it briskly a couple of times with a soft rubber hammer and it really does not do a hard crimp but more just pushing the rim of case inward real tight on the bullet, I have loaded hundreds of 30-30 shells like this and never had a problem. I have never had the bullets push inward either. You don't need to mash the case in to get a crimp, just something to hold bullets in neck , especially in a tube magazine. I also moly coat my bullets, this helps with the light crimp as far as holding them in case neck.