I've been using my 45-70 with the stock iron sights but was having trouble seeing the paper at 100 yards and my targets/groups weren't very good so I decided to scope it (yeah I know). Anyway was pleasantly surprised with what it was capable of after I had scoped it.
The above target was shot with remington 300grn SJHP (jacketed .457 diam) and 39.2 grains of imr 4198 powder.
I also tried some cast 340 grn and 405 grn (.457 diam....same powder) but they shot much worse....about 3-4 inches. I've got some more 405's ordered but they are .459 as opposed to the .457 I have now. I'm hoping that the extra diameter will tighen up the groups a bit out of the marlin. Any thoughts?


The above target was shot with remington 300grn SJHP (jacketed .457 diam) and 39.2 grains of imr 4198 powder.
I also tried some cast 340 grn and 405 grn (.457 diam....same powder) but they shot much worse....about 3-4 inches. I've got some more 405's ordered but they are .459 as opposed to the .457 I have now. I'm hoping that the extra diameter will tighen up the groups a bit out of the marlin. Any thoughts?
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