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Author Topic: Twist rate question  (Read 424 times)

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Offline DEACONLLB

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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
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Offline Ladobe

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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.   
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Offline DEACONLLB

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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
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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.
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