Id have to look back for a post from the past where I ran a chronograph on my Ruger carbine.So far that has been a leading contender.
Thinking the velocity was running high 1900’s using a max pistol load.
Back in the day, you could buy .44 mag ammo for rifle and buy for pistol.
I have to assume they discontinued the rifle ammo that was hotter because idiots were trying to get more from their pistols using that ammo with poor results.
Haven’t tried anything more than hot pistol loads in the rifle as the results on deer has been more than satisfactory. No need to beat it to death getting another 200 fps.