W872 Duplex loads for the 6x45 anyone tried this.

[brstevns]

Has anyone tried using Duplex loads using W872 with cast from 60gr to 95 gr in the 6x45. In both Ar15 and Bolt Action rifle?

[405grain]

W872 is the powder for 20mm vulcan guns, and might be very slow for a small cased 6mm. Instead of attempting a duplex load try using magnum primers first. Other powders like BLC-2, H335, H322, IMR-4895, or IMR-4198 would be much better suited to this cartridge. (Almost any powder that works well in the 223 would be a good choice for the 6x45.)

[zarrinvz24]

From what I recall, 308 sized cases seem to be the lower limit for WC872. I had researched using this in 30-30 some time ago and all I remember is unsuccessful attempts.

[brstevns]

Wish I could find the article again, but read where a guy was using 4 to 5 gr blue dot the rest with W860 or W872 under a 80 gr cast bullet . Said it worked great and cycled his AR ?

[MUSTANG]

Might be some of my posts you were thinking of. Here are some links. I believe that a slight amount of work starting with my posts on the .223/5.56 will get you where you want to be.


https://castboolits.gunloads.com/showthread.php?241228-WC872-in-223%92s&highlight=

https://castboolits.gunloads.com/showthread.php?160094-WC860-in-223-5-56-Yes-But&highlight=


https://castboolits.gunloads.com/showthread.php?241972-LeverEvolution-Loads-in-223-5-56&highlight=

[brstevns]

Might be some of my posts you were thinking of. Here are some links. I believe that a slight amount of work starting with my posts on the .223/5.56 will get you where you want to be.


https://castboolits.gunloads.com/showthread.php?241228-WC872-in-223%92s&highlight=

https://castboolits.gunloads.com/showthread.php?160094-WC860-in-223-5-56-Yes-But&highlight=


https://castboolits.gunloads.com/showthread.php?241972-LeverEvolution-Loads-in-223-5-56&highlight=

It might have been. Thank You for the links.
Question have you tried 4198 as a kicker in the 6x45?

[MUSTANG]

No. I used pistol powders because I have lots of different ones to choose from. I reserve 4198 as a primary powder (no duplex loads). Many who have used "Duplex" Loads with 860/870/872 had advocated use of "Medium Burn Rate Powders" for the"Duplex Powder". I have not done so.

[brstevns]

No. I used pistol powders because I have lots of different ones to choose from. I reserve 4198 as a primary powder (no duplex loads). Many who have used "Duplex" Loads with 860/870/872 had advocated use of "Medium Burn Rate Powders" for the"Duplex Powder". I have not done so.

I have Bullseye, Unique

[rbuck351]

I have a bunch of 5010 that I duplex with good results but I don't use it anything smaller than 308.

[MUSTANG]

I have Bullseye, Unique


If I were working up the load; I would emulate the post I had on WC872 in the .223. I would take a "Full "Charge of WC-872 (measure at the Shoulder Taper - then weigh the WC-872 charge). I would then subtract 3 grains of WC-872; and replace it with 3 Grains of Unique over the flash hole and the WC872 on top. Fire 5 rounds for testing. Then incrementally change the ratio to 4 Unique + WC872, 5 Grains of Unique + WC872 (each time incrementing & decrementing the ratio of Unique and WC872.

Look for pressure signs such as flattening of primers with each incremental increase of Unique.

[brstevns]

If I were working up the load; I would emulate the post I had on WC872 in the .223. I would take a "Full "Charge of WC-872 (measure at the Shoulder Taper - then weigh the WC-872 charge). I would then subtract 3 grains of WC-872; and replace it with 3 Grains of Unique over the flash hole and the WC872 on top. Fire 5 rounds for testing. Then incrementally change the ratio to 4 Unique + WC872, 5 Grains of Unique + WC872 (each time incrementing & decrementing the ratio of Unique and WC872.

Look for pressure signs such as flattening of primers with each incremental increase of Unique.

Thanks I will do that. with this virus thing going on it looks as if it will be a while before I can do any shooting.
Have you tried 60gr cast bullets with this type of loading?

[MUSTANG]

Thanks I will do that. with this virus thing going on it looks as if it will be a while before I can do any shooting.
Have you tried 60gr cast bullets with this type of loading?


Acquired a few .22 molds; but have not cast/shot with them. I have swaged .224 boolits and tumbled lubed them and powder coated also (55 grain to 80 grain) and shot them using only 2400. They performed well.

[brstevns]

What about a 60gr cast in the 6x45 ?