20 TAC Sierra 39 Grain Load Data Needed

[tred1956]

Just downloaded Seirra app which has everything I need. Thanks

20 TAC Sierra 39 Grain Load Data Needed

Just formed a hundred 20 Tac brass from new Winchester 223, man I LOVE being retired. Going to be loading some Sierra 39 grain bullets in the next day or two and am having trouble finding load data for them. They will be shot in a 20 TAC Contender with 22 inch OTT barrel. Been shooting 32 grain and just want to try the 39s. Have access to a LOT of different powders. BL-C2,H322, H4198, H335 just to name a few. Need starting load or "pet load" if you have one.
All input appreciated
Thanks in advance and Happy Fathers Day to ALL
Doug

 

[Ramblerman]

Not components you are mentioning but mine really likes 24.5+gr benchmark with the 40gr vmax. Didn't like Shooters World Precision nearly as well as my Dasher that also liked Varget.

 

[jepp2]

Need starting load

The 20 Tac and the 20P are so similar in case capacity, you should be able to use the same starting loads. There is quite a bit of load data for the 20P with the 32 gr bullets, but very little available using the heavier bullets. So I did a multiple powder test using the Speer 39 gr bullets. Take these at face value. I used my previous experience with the powders to adjust the Ba in QuickLoad for an estimated 50K psi load (conservative in case my calculations didn't hold up). But you can see the actual velocities I measured in the far right column.

I listed the 223 and 204 Ruger listed loads just for a reference. The water capacity isn't that much different, and typically I find the starting load in the 204R is a max load in the 20P. Since I was kind of in uncharted territory, I wanted as much assurance as I could get.

 

[tred1956]

Thanks guys
Doug