Home Forums Hunting & Shooting Express Rifles and Big Bores Only The great 458 Winchester. Everyone should own one at least once

Sir Scotty,
Very nice M70 deer rifle ! Buy a donkey for that gunporn.

I previously recorded your H4198 load data with the 250-gr Monoflex, very consistent with what I got.

H4198 was most accurate with max load of 82.0 grains (compressed) for 3075 fps MV in a 24" barrel of Ruger No. 1.

AA-5744 was most accurate with my starting load of 65.0 grains (not compressed) for 2725 fps MV in same rifle.
The AA-5744 start load was most accurate of all in Daisy the Ruger No. 1.
0.63 MOA for 3 shots at 50 yards, 3 overlapping .458-caliber holes at that range.

1.16 MOA was the best I got with H4198 for 3075 fps MV.

With Monoflex BC of only 0.175 you add 39 fps for the 5-yard correction of chronograph velocity to MV in the 2900 to 3000 fps range.
When you get over 3000 fps MV it is 40 fps correction !
The faster you go the faster you lose .
My 2725 fps MV load only loses 37 fps in first 5 yards, ha ha.

Got that Leupold 1-5x20mm headed out for warranty repair?

I am switching back to Leupold since Nikon scopes are defunct now. Sad.
Weaver too, boo hoo.
I will use them until I bust them.
The fixed power is a good idea for recoil tolerance, as is 1" tube instead of 30mm, as is smaller objective lens ...
all adds up to Leupold 2.5x20mm as a primary or as backup for the bigger scopes.
Or iron sights and QD rings as you have.
The Leupold 2.5x20mm is as close to immortal as it gets on a .458 WinMag.