« previous next »
Pages: [1]   Go Down

Author Topic: Twist rate question  (Read 423 times)

0 Members and 2 Guests are viewing this topic.

Offline DEACONLLB

  • GBO Supporter
  • Trade Count: (149)
  • Senior Member
  • *****
  • Posts: 2458
  • Gender: Male
Twist rate question
« on: January 21, 2010, 03:28:40 PM »
Any one know the twist rate of the TCR 87 barrel in 223 also what is it for the Encore same cal. and a long shot the Mossberg ssi1 in 223?

Deaconllb
Logged
Korean war vet. NRA Member
Fourth fighter wing K14 Kimpo Korea 1952 Fourth but first, the mig killers.
533rd material ,air defense Oxnard AFB 1953-1955
Pastor of the  CBCG-Fellowship group Tulsa Oklahoma.

Offline Ladobe

  • Trade Count: (91)
  • Senior Member
  • *****
  • Posts: 3193
Re: Twist rate question
« Reply #1 on: January 21, 2010, 06:11:46 PM »
The TCR and Encore are both 1:12.   

No idea on the Mossberg SSI, but since the SHOT Show is in town right now it reminds me of seeing/handling the prototypes of these rifles at the SHOT Show here in 2000, about a year before they came out.   
Logged
Evolution at work. Over two million years ago the genus Homo had small cranial capacity and thick skin to protect them from their environment. One species has evolved into obese cranial fatheads with thin skin in comparison that whines about anything and everything as their shield against their environment. Meus

Offline DEACONLLB

  • GBO Supporter
  • Trade Count: (149)
  • Senior Member
  • *****
  • Posts: 2458
  • Gender: Male
Re: Twist rate question
« Reply #2 on: January 22, 2010, 02:59:43 AM »
Well it would seem that the twist rate is to fast from what I read on other post and will only shoot factory loads in 55 grn because of length and weight of bullets. I shot some 69 grn in  the tcr and they left a keyhole type hole not a perfect keyhole but a little longated where as the SSi 1 left a perfect hole with same bullet so its twist rate must be slower. will do some more checking I really think the problem is undersized bullets as there is about 3 thousands different in the 69 grn. and the 55 grn. have checked 4 different brands and all are the same except the 69 grn.

Did some more searching and have found a chart for twist rat on all mosberg SSi1 rifle barrels and the twist rate for 223 is 1-9 so that is the reason it will handle the heavier bullets.


Deaconllb
Logged
Korean war vet. NRA Member
Fourth fighter wing K14 Kimpo Korea 1952 Fourth but first, the mig killers.
533rd material ,air defense Oxnard AFB 1953-1955
Pastor of the  CBCG-Fellowship group Tulsa Oklahoma.
Pages: [1]   Go Up
« previous next »