SIERRA TMK

14 March 2016, 14:36

Andre Mertens

I like Sierra and am a regular user of their regular SMK. I trust their tipped SMK will be up to the task but I do not plan the switch as I've long given up S-A rifles .

14 March 2016, 19:33

Fjold

I'm wondering if they'll discover that the tips are melting in midair like Hornady did?

One of the defense contractor is using our club's range to track bullets thermally. Just due to air friction, they can track bullets as small as 22 caliber from a kilometer away, at angles of 90 degrees to the line of flight.

Frank

"I don't know what there is about buffalo that frightens me so.....He looks like he hates you personally. He looks like you owe him money."
- Robert Ruark, Horn of the Hunter, 1953

NRA Life, SAF Life, CRPA Life, DRSS lite

24 January 2022, 04:39

sputster

Returning to this thread; just started shooting Sierra 155gr TMKs over Varget in a 308 Win. Seated to the OAL from the Sierra manual 2.800”. While the chrono data looks very consistent, the accuracy is poor compared to the Berger flat base and Hornady A-Maxes I have used in it. The rifle has a Bartlein barrel with a not very long freebore. Just wondered if anyone else found TMKs to be seating depth sensitive.

27 January 2022, 05:58

Wstrnhuntr

quote:
Originally posted by sputster:
Returning to this thread; just started shooting Sierra 155gr TMKs over Varget in a 308 Win. Seated to the OAL from the Sierra manual 2.800”. While the chrono data looks very consistent, the accuracy is poor compared to the Berger flat base and Hornady A-Maxes I have used in it. The rifle has a Bartlein barrel with a not very long freebore. Just wondered if anyone else found TMKs to be seating depth sensitive.

Looking at that particular bullet it isn't surprising. Im guessing it is a secant ogive but their website doesnt say. It has a very short bearing surface and a rather sharp intersection. Im tired of farting around with secant ogives myself. Tangent is just better for a simple guy like me.