Rifles and handguns sharing common ammunition is of course a old and valid combination. There have been many articles written over the years on the subject. You must understand that Marlin uses microgroove rifling on many pieces and the differing system, twist rate and numerous nearly intangible variances will make a load performing well in both pieces nearly impossible. That was the conclusion of Ken Woods years ago in a Handloading magazine article. The rifle range is limited by the cartridges ballistics. You can squeeze a little more useable range with a peep sight and the modest velocity increase-but do not expect any Adobe Wells shots. Something later exploration leaders insisted upon was uniformity of both firearms and ammunition. Aside from logistic sense, the ability to rebuild one functioning firearm from two disabled ones in the field was paramount.