Reloading .458 Win Mag

I have a #1 .458 and a tang safety 77 .458 load everything from 300 to 500 grain bullets, I have found IMR 4198 does everything I need to do.
 
I bought a Zastava LK M70 in 458 Win Mag in about 2013 or so. Was more "toy" than anything - does not really make sense for stuff in bush around here (Western Manitoba). After several years standing in cabinet - I found the wood bulkhead at rear of magazine mortice to front of trigger mortice to have cracked completely through. The rifle has a visible cross bolt in front of magazine mortice, but none behind magazine. The barrel does not have a secondary recoil lug. I ended up removing the large Zastava trigger and installing a standard military 2 stage trigger - much smaller - several ounces of epoxy in there to hold the wood stock's sides together, and much smaller cavity for the replacement trigger. I am pretty sure I laid in a "U"-shaped "stirrup" to be like rear cross bolt - a la Weatherby rifles - is all hidden. Then I installed a Gentry (Dakota?) safety on the bolt. On CGN I found some elderly Redfield flip up aperture sights - drilled and tapped into the rear of the rear scope base - so is a "flip up" aperture sight there - the M8-2.5x Compact Leupold is using old school "big knob" Weaver rings, so is easy enough with fingers to go aperture sights, if that scope ever dies. If I ever come across Low Warne QD rings, I may go with that. Is still to receive a banded front sight - through my own clutziness, I knocked off the front sight ramp when trying to replace to a fiber optic front sight bead - sort of surprised how flimsy that attachment system is - is a "top hat" shaped post, in a shallow dovetail - then some dabs of epoxy (?) glue - so I think I want a banded front sight - like I see that NECG makes.
 
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Right, .458 WM Zastava LKM70 has just a single cross bolt. Remington did 2 cross bolts on the .458 WM & laminate stock no issues with mine. Mentioned I have a .375 H&H LKM70 full stock carbine re-barreled to .416 RM has just a single cross bolt however I had it properly bedded no issues to date.
 
2400

  • today tried way old supply of 2400 with 400gr / 405gr & CCI 200 primer
  • 2.2cc (~29gr)+polyfil adapted load from Lyman Cast Bullet Handbook
  • ***safe in my rifle only***NOT A RECOMMENDATION
  • low pressure maybe better consistency increase charge and/or increase seating depth?

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Potashminer said:
I bought a Zastava LK M70 in 458 Win Mag in about 2013 or so. Was more "toy" than anything - does not really make sense for stuff in bush around here (Western Manitoba). After several years standing in cabinet - I found the wood bulkhead at rear of magazine mortice to front of trigger mortice to have cracked completely through. The rifle has a visible cross bolt in front of magazine mortice, but none behind magazine. The barrel does not have a secondary recoil lug. I ended up removing the large Zastava trigger and installing a standard military 2 stage trigger - much smaller - several ounces of epoxy in there to hold the wood stock's sides together, and much smaller cavity for the replacement trigger. I am pretty sure I laid in a "U"-shaped "stirrup" to be like rear cross bolt - a la Weatherby rifles - is all hidden. Then I installed a Gentry (Dakota?) safety on the bolt. On CGN I found some elderly Redfield flip up aperture sights - drilled and tapped into the rear of the rear scope base - so is a "flip up" aperture sight there - the M8-2.5x Compact Leupold is using old school "big knob" Weaver rings, so is easy enough with fingers to go aperture sights, if that scope ever dies. If I ever come across Low Warne QD rings, I may go with that. Is still to receive a banded front sight - through my own clutziness, I knocked off the front sight ramp when trying to replace to a fiber optic front sight bead - sort of surprised how flimsy that attachment system is - is a "top hat" shaped post, in a shallow dovetail - then some dabs of epoxy (?) glue - so I think I want a banded front sight - like I see that NECG makes.
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.458 win mag is a pretty universal cartridge loaded with something like hornady or Speer 350gr loaded right are perfect for deer and black bear maybe moose out to 150 yards. Personally I’d step it up to 400-500gr for moose wish I could find more 500gr interlocks.
 
I have settled on IMR-4198 as the powder of choice for all bullet weights in the 45-70, 45-90 and 458 Win Mag. It does it all from "powder puff" to "full-house" loads. I stopped even trying other powders after I discovered that.
 
Andy said:
I have settled on IMR-4198 as the powder of choice for all bullet weights in the 45-70, 45-90 and 458 Win Mag. It does it all from "powder puff" to "full-house" loads. I stopped even trying other powders after I discovered that.
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I wish I could find some. I’m going to use accurate 2015 for the time being.
 
I’m wondering if the cam pro bullets couldn’t be driven a bit faster.

I recently bought some reloading equipment and manuals from an estate and in Lyman #45 theirs 4064 data for 405gr jacketed data starting loads are 1949fps.

I would like to find a suitable pistol powder that’s available on the self to use for lower velocity loads all I have on hand is hs6.
my go to for this type of load is red dot but Alliant seems to be on vacation.
 
I loaded up some hornady 350gr round nose over 67.5gr and 69gr of accurate 2015 might see how they shoot this weekend.

Hodgdon doesn’t say this is a compressed load but 69gr pretty much filled the case to the base of the bullet.
 
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