TAC powder and Sierra 55gr HPBT data?

[rcsauer]

I want to start loading my own 55gr Sierra HPBT (#1390) rounds with TAC powder but ran into a problem right at the start. My Sierra manual has different data from that provided by Ramshot. Anyone have any insight as too which is closer to being correct? There is quite a bit of difference between the two and want to get some input before getting started.

Sierra data:
55 gr Sierra HPBT (#1390) Max load of 26.3gr COAL 2.240”

Ramshot data:
55gr Sierra HPBT (#1390) Max load of 25.8gr COAL 2.160”

Anyone load these bullets that can give me a hand?

 

[montanawolverine28]

is that the tac powder ? and is this for a ar or a bolt gun.

 

[montanawolverine28]

sorry it is tac. i use 25.5 grains in my ar-15 and drop it a little for my bolt gun. down to about 25.

 

[rcsauer]

This is for my AR.

 

[montanawolverine28]

25.5 grains is a good load for a ar-15 shoots good.

 

[Kracker]

Here is what my AR’s load is

55gr Berger hp
25.5gr TAC
CCI Mag primers
LC brass

Results may vary! rp

 

[zilla]

I'd go with the Sierra AR data.. Their bullet, their testing, their data.. Work up your own load..

Note: 25.5 TAC w/55 is near max load..

http://accurateshooter.net/Downloads/sierra223ar.pdf

 

[nastynatesfish]

Go to ramshot powder website and follow the links to the load info. Im using 25gr with 69gr bullets.

 

[Heretic]

I use Sierra 1390, and 1365 in my AR and Rem700

But I use Xterm. I use the data from Ramshot.

 

[rcsauer]

Thanks for the help. I'm going to load some up this weekend.

 

[unloaded]

Pretty big difference in COL there.

 

[anytym]

I have been loading the 55 grain VMax for .223 5.56, with 24.2 grains of TAC. and try to hit 2.24 OAL with preferably LC once fired prepped brass. I've loaded over 75,000 of these for AR's and no compliants yet. That load was given to me by the owner of HSM as his load for AR's. I have also shot that in my Savage LRPV with a longer OAL into one hole 5 shot groups. 3 years ago I was loading 1000 rounds for $165. Now the cost is right around $200. The Super 1050 Dillon runout on these reloads are close to .001. I really couldn't tell much difference from the loads made with Redding Competition Match dies. The seater in the Dillon is a RCBS Gold Medal Match Die. The other plus with TAC is the powder drop is always spot on every time.