Findly worked up a load with H4198, 205, hornady 45gr SP.
My rifle realy likes this bullet at a modest 2900fps, that is at max OCL of 1.830" (.50" or better). At 18.0grs I was seeing 3088fps with no pressure signs. The std-dev is in 16 "ish" from 17.1-17.4-17.7-18.0grs. I will have to play with the OCL and charge to see if I can find a velocity above 3000fps that will group just as good. Any where from 3000 to 3200fps would be fine.
One manual starts at 17grs and stops at 18grs and another starts at 18grs and goes to 18.9grs. And I have the BR4 to try as well. If you remember I used AA1680 and the BR4, the 205 primer did better with the ball type and 17.0grs worked very well for 3120fps but still not as accurate as needed and I would say more pressure for the same velocity H4198 will get, with out having to use the body bump dies every other loading.
I may get a Shilen factory contour barrel when they start doing the smith work late this year. I seem to have a large chamber on this used rifle so I am gonna keep the pressure modest till I get a new barrel. I think 3100fps is realy easy and the primer edges are still round too.
The 45gr Spire point has the same required velocity as the SXSP 50/55gr does so I think it should work well yotes and bobcats.
22-hornet 221Rem and 223Rem
My rifle realy likes this bullet at a modest 2900fps, that is at max OCL of 1.830" (.50" or better). At 18.0grs I was seeing 3088fps with no pressure signs. The std-dev is in 16 "ish" from 17.1-17.4-17.7-18.0grs. I will have to play with the OCL and charge to see if I can find a velocity above 3000fps that will group just as good. Any where from 3000 to 3200fps would be fine.
One manual starts at 17grs and stops at 18grs and another starts at 18grs and goes to 18.9grs. And I have the BR4 to try as well. If you remember I used AA1680 and the BR4, the 205 primer did better with the ball type and 17.0grs worked very well for 3120fps but still not as accurate as needed and I would say more pressure for the same velocity H4198 will get, with out having to use the body bump dies every other loading.
I may get a Shilen factory contour barrel when they start doing the smith work late this year. I seem to have a large chamber on this used rifle so I am gonna keep the pressure modest till I get a new barrel. I think 3100fps is realy easy and the primer edges are still round too.
The 45gr Spire point has the same required velocity as the SXSP 50/55gr does so I think it should work well yotes and bobcats.
22-hornet 221Rem and 223Rem