4759 Substitute

[ET1]

Since the discontinuation of 4759 that many 50-SML shooters have enjoyed for years, I’m wondering what other shooters are now using. My first choice is Rel-7 with a 250gr bullet. Surprisingly Rel-7 is a much cleaner burning powder but more is required. Not sure how temp sensitive this powder is but plan some shooting in colder weather.

[delmer]

Besides the 4759 you mention, I've also used Accurate Arms 5744 and VihtaVuori N110 with good results. Both use the same weight (give or take a grain or two) as 4759. Luckily I have a good supply of all three powders. Check out this link for alternatives, and approximate weights for loads.

https://www.chuckhawks.com/ping_pong_balls.htm

[ET1]

Delmer

Thanks for your response.
Even though Chuckhawks promoted Alliant 2400 You couldn’t pay me to try this powder again. Had misfires on a humid day. Also, it’s one dirty powder that fouls fast and that’s hard to clean from the bore. As for the rest other than REL-7 I haven’t tried them. For 250gr copper bullets I’m looking at a velocity of 2500fps that will do all I need out to 200yds. Rel-7 will give me that.
I have about 1-1/2 pounds of 4759 left that I’m burning up testing certain lighter bullet loads. Surprisingly 4759 is a somewhat dirty powder and will be glad to burn it up.

Again thanks for your response.

[ET1]

These are my reasons for going to Rel-7 with 250gr bullet.

[overtheir]

Hi i use reloader 7 in my 45 cal (40 with a sabot) find it very accurate and i knurl my bullets powder is not that dirty ,my barrel is a Brux barrel .I believe I posted pictures of the results a few yrs ago

[ET1]

Hi i use reloader 7 in my 45 cal (40 with a sabot) find it very accurate and i knurl my bullets powder is not that dirty ,my barrel is a Brux barrel .I believe I posted pictures of the results a few yrs ago

Thanks for your response. I also find Rel-7 to be a very clean burning powder. It's the cleanest burning powder I have tried so far.
I too am a firm believer of knurling bullets to get the desired fit and to ensure proper rotational spin, but that's another topic.
I'm curious to know what bullet/weight you are shooting? I'd like to see if a pressure trace is available for your load.

You appear to have a good handle on your 45cal, so I won't wish you good luck, but good hunting this Fall.