I have a confession to make, I am desperately cheap. I bought one tube of bore butter once. I think it came with the revolver I bought. Anyways, I used it and liked it for quite a while, but just recently ran out. Being the cheapie that I am, i decided to find a more economical solution.
I used lard, yep, good old cooking lard, and I can't really tell the diference other than the smell. In my revolver I started using wads after I ran out of bore butter, so I haven't used much lard in it yet. In my .50 CVA Plains Hunter however, I am using lard as a patch lube and preservative with much success.
First thing I did was to give my barrel a good hot soapy water cleaning and let it dry. Then I ran a larded patch down the bore and wiped the outside down with a soft cloth with a little lard on it. Two weeks on the rack in my basement and I see no problems yet.
So, I decided to go to the range with my brick of lard and some cheap cotton flannel cleaning patches. My load is 90 grains of FFg Elephant under a .490 round ball. This load shot 1" groups at 50 yards, which I was extatic about. Before, with some pathetic muslin patches and bore butter I was barely hitting 6" circles at 50 yards! I'm sure the flannel patches are the reason for my accuracy now though, not just the lube.
After a few shots I still get fouling in my gun. I can't shoot more than 3 shots without swabbing, but I never could with Bore Butter either. I swab a patch with some lard and carefully work it down the bore a few times and I am ready to shoot again.
I am pretty happy with lard. I pay $1.00 a pound for it instead of $7 or $8 for bore butter. I have also heard that lard is similar to Bear Grease that was used back in the golden days. Supposedly bear grease seasoned the old soft iron bores back in the day. I'm hoping that, even with modern steel, the lard might "season" my bore a little and I might not have as much of a fouling problem. Even if it doesn't help, I'm still saving money.