« previous next »
Pages: [1]   Go Down

Author Topic: .223 vs 7tcu pressures  (Read 665 times)

0 Members and 1 Guest are viewing this topic.

Offline quicksdraw45

  • Trade Count: (0)
  • Avid Poster
  • **
  • Posts: 143
.223 vs 7tcu pressures
« on: March 22, 2003, 06:17:01 AM »
I just got a 7tcu barrel from ED . Who ever had this barrel before me must not have hardly shot it ,There is barley a mark on it.
I have been looking at my reloading manual and the max charge for .223 is 28 grains of blc-2 (my .223 loves the stuff) but the 7tcu will take 33 grains , Is the case capacity increased that much from the parent ??What kind of pressure is devolped in the tcu ? A heavyer bullet and more powder I would think devolops more pressure ??
Logged

Offline Nobade

  • Trade Count: (2)
  • Senior Member
  • *****
  • Posts: 1927
.223 vs 7tcu pressures
« Reply #1 on: March 22, 2003, 07:43:52 AM »
The case does hold quite a bit more than a .223, but the main thing is the bore is so much bigger - thus, the expansion ratio is a lot quicker. The peak pressures are going to run about the same even though you have a much heavier bullet and more powder.
Logged
"Give me a lever long enough, and a place to stand, and I'll break the lever."

Offline Steve P

  • Trade Count: (10)
  • Senior Member
  • *****
  • Posts: 1733
  • Gender: Male
.223 vs 7tcu pressures
« Reply #2 on: March 24, 2003, 03:07:33 PM »
BLC-2 will work in the 10" 7tcu, but be prepared for 2 foot flames coming out the end of the barrel.  This is in the daylight.  They will be even longer in the dark.  WSR primers seem to work best with this type powder.  

Have fun!! :twisted:

Steve  :wink:
Logged
"Life is a play before an audience of One.  When your play is over, will your audience stand and applaude, or stay seated and cry?"  SP 2002
Pages: [1]   Go Up
« previous next »