20 tac loads
- Thread starter niceone
- Start date
Re: 20 tact loads
When you say Tact loads, I have to assume your talking about a tactical type rifle, like maybe an AR type. If so, you want to FL size all brass, and keep the bullet seated to fit the mag. So the case capacity should remain about the same, and internal pressure should remain relatively close, depending on the powder type and the temperature of the ammo when fired. You should stick relatively close to the gas guns recommendations.
If its a bolt gun, forget this post, but be more specific in your questions.
M.
When you say Tact loads, I have to assume your talking about a tactical type rifle, like maybe an AR type. If so, you want to FL size all brass, and keep the bullet seated to fit the mag. So the case capacity should remain about the same, and internal pressure should remain relatively close, depending on the powder type and the temperature of the ammo when fired. You should stick relatively close to the gas guns recommendations.
If its a bolt gun, forget this post, but be more specific in your questions.
M.
guessing from your original post you are talking about a .20 TAC, if so are you using 223 brass necked down to the 20 or Dakota/Lapua 20 TAC brass? If virgin 20 TAC would think you should NOT be seeing pressure signs, but if you are fire-forming 223 brass to 20 TAC, which can be done using either a form die or full length and fire form you might see some pressure signs.
There are some guys here with more experience than I that should be able to give you more input. Just started working with a 20 TAC build. Good luck.
There are some guys here with more experience than I that should be able to give you more input. Just started working with a 20 TAC build. Good luck.
Hi,
No reason at all that virgin brass wil shwo more pressure but it wise to fire form the cases first with a fairly moderate load.
I assume you are talking cratered primers and maybe web expansion near the case head. If you are getting web expansion back the load down a grain or a grain and a half or you will soon need new brass. If cratering try CC1 BR4s, they are tougher than 205s and while they mask high pressures you know they are present. I would still back the load down.
A
No reason at all that virgin brass wil shwo more pressure but it wise to fire form the cases first with a fairly moderate load.
I assume you are talking cratered primers and maybe web expansion near the case head. If you are getting web expansion back the load down a grain or a grain and a half or you will soon need new brass. If cratering try CC1 BR4s, they are tougher than 205s and while they mask high pressures you know they are present. I would still back the load down.
A
I know exactly what you are talking about. I also have a 20 Tac and I am experiencing the same condition. In my case, there were no signs of pressure at all except the flow of metal from the primer into the firing pin hole. The primers were not flattened, there was no ejector mark on the base of the case, and there was no expansion on the web.
I noticed it mainly when the brass was new. I had fireformed some 223 brass but it was also evident with new Lapua 20 tac brass. I backed off all of my loads and the excessive "cratering" stopped however some is still noticeable.
I am beginning to feel that the problem is in the primers themselves, as someone as said already that a thicker harder primer cup may be the answer.
My gun is away right now being restocked but I will begin testing again as soon as the gun comes back.
Please keep this thread alive with your results as I will be checking back. I will keep you aware also once I get my rifle back.
I noticed it mainly when the brass was new. I had fireformed some 223 brass but it was also evident with new Lapua 20 tac brass. I backed off all of my loads and the excessive "cratering" stopped however some is still noticeable.
I am beginning to feel that the problem is in the primers themselves, as someone as said already that a thicker harder primer cup may be the answer.
My gun is away right now being restocked but I will begin testing again as soon as the gun comes back.
Please keep this thread alive with your results as I will be checking back. I will keep you aware also once I get my rifle back.
Hey guys..I've been with this cartridge since Todd put it in production some 11-12 years ago. What it sounds like to me is, you are getting primer flow-back. When you see this, your first intentions are to back the powder charge down..however I would put money on it that if you chrono your current load, ur getting around 4150-4200fps w/32's. and 3800+ w/40's. This are mild loads and ur not getting full potential of the round.
I had the same exact problem and sent the bolt only to Greg Tannel and he explained to me that its quite common for Remy to have an enlarged firing pin hole resulting in primer to flow back and in around ur firing pin which will eventually result in ur bolt to no longer work (ask me how I know) From the time I sent the bolt off to recieving it was like a 1 week turn-around with the bolt in my hands. I just pulled mine out of the safe and the bolt has been bushed by Greg and it measured .057 at the firind pin pertrusion hole. Hope this helps
I had the same exact problem and sent the bolt only to Greg Tannel and he explained to me that its quite common for Remy to have an enlarged firing pin hole resulting in primer to flow back and in around ur firing pin which will eventually result in ur bolt to no longer work (ask me how I know) From the time I sent the bolt off to recieving it was like a 1 week turn-around with the bolt in my hands. I just pulled mine out of the safe and the bolt has been bushed by Greg and it measured .057 at the firind pin pertrusion hole. Hope this helps
I use the current for loads:
32 Grain Bullets
-25.3 RL-10x
40 grain bullets
-24.6 RL-10x
All loads with Winchester or Lapua/Dakota Brass and use Fed. small rifle primers or CCI, or Wolf small rifle primers.
After bushing the bolt, all problems resolved and I even got to increase my powder charge b/c the primer flow back wasn't even existant anymore.
32 Grain Bullets
-25.3 RL-10x
40 grain bullets
-24.6 RL-10x
All loads with Winchester or Lapua/Dakota Brass and use Fed. small rifle primers or CCI, or Wolf small rifle primers.
After bushing the bolt, all problems resolved and I even got to increase my powder charge b/c the primer flow back wasn't even existant anymore.
I agree send your bolt to Greg Tannell to have the firing pin bushed and your problem is solved. Federal primers tend to be softer than Rem. 7 1/2 and CCI 450 or CCI BR 400 but after having my Rem. 700 bolt's firing pin bushed I can use Federal 205's. The 20 Tac is high pressure by nature and lends itself very well to a bushed firing pin in any production rifle.
Rodney
Rodney
niceone said:
Federal.
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