mshm99
Junior Member
Posts: 75 
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Post by mshm99 on Dec 11, 2022 19:14:04 GMT -5
Illinois has changed the regulations to allow single shot rifles with straight wall cartridges and some other chamberings for deer. It just so happens I have a factory ported , 45/70 Contender Barrel I bought many moons ago. Years ago ,I tried a number of tricks, but the 300 grain loads from that light Carbine had vicious recoil. So after it beat me up sufficiently , I set it aside. So now Hornady has a 250 grain .458 monoflex. So I’m gonna dust off the barrel and start over. Since I have a good supply of VV N120 I want to use that. I’m thinking Trapdoor loads a good start, but can’t find any load suggestions where to start? Any QL suggestions?
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Post by joelmoney on Dec 17, 2022 0:38:44 GMT -5
Hornady Edition 10 has listed
IMR SR 4759 max of 28.5
Alliant RL-7 max of 40.7 —1800fps
Accurate 5744 max of 33.8
With a case trim length of 2.040
These are trapdoor loads
IMR 4198 max of 49.2
H4198 max of 52.2
Norma 200 max of 53.8
Vith N 130 max of 53.4
Alliant RL 7 max of 53.9
Accurate 2015 max of 53.4
1895 Marlin loads also trim length of 2.040
The 450 Marlin cartridge has Viht N 120 as a listed powder
42.9grs at 1900fps —- 49.2grs at 2250fps also a 2.040 trim length.
Not quite the information you were looking for but hopefully it helps.
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mshm99
Junior Member
Posts: 75
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Post by mshm99 on Dec 17, 2022 11:02:14 GMT -5
Thanks. this helps
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Post by joelmoney on Dec 17, 2022 16:20:04 GMT -5
Hornady notes
“The data below was developed with Monoflex bullets. Due to the longer ogive it is critical that the cartridge be trimmed to the length specified.”
COL 2.587”
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