28 nosler

[cjuve]

Thanks cjuve .. My smith is building mine to 3.73 coal to the lands so I should be very close to the same as you .. My barrel is 30 inches long so I should get 3175 or so easy with retumbo it looks like .

No problem, when I first started working with this cartridge there was not a lot of info out there so I struggled a bit to get things going, just wanted to share the info. For what it is worth it looks like I am going to end up at 79.5 gr with an avg. velocity around 3065 FPS. I am already getting a single digit standard deviation and have not fussed with seating depth at all, looks like there is some good long range potential there.

 

[Longrangec]

Alright thanks for all the info so far .. the more info I get the easier load development will be and it will be cheaper on the wallet. I'm gonna start loading at 78 and ease into it ..

 

[SnakeRiverEric]

My accuracy node is at 78.5gr and 3075fps with a 26" benchmark barrel and win70 action.

 

[breakshntr]

Just started load development with my 28 nosler and Retumbo
As stated before this is a long throat version so these loads are not suggested for a standard rifle throat configuration.

195 Berger EOL
CCI 250 primer
Retumbo
26" Brux barrel
.280 freebore
Coal = 3.740 +/- .020 jump
Magneto speed

75 gr - 2906 FPS
76 gr - 2934 FPS
77 gr- 2920 FPS. Delayed ignition
78 gr - 3007 FPS highest shot on target
79 gr - 3065 FPS 79,80,81 formed .520" group
80 gr - 3077 FPS 80 and 81 went into same hole
81 gr - 3112 FPS
81.5 - 3137 FPS bolt was a little stiffer extraction was easy
82 gr - 3136 FPS bolt was stiffer yet 1/2" lower POI
82.5 - did not shoot

I am going to load from 79.0 - 80.5 and compare POI looks like there may be a pretty good node there with decent velocities.

This is excellent news. I will surely be testing me some Retumbo. Looks like 100fps less velocity at best vs. RE33 as long as I can find solid accuracy I will be very happy knowing Im running a stable powder. Still a long range hammer.

 

[Jeremyc]

Anyone have a 28 no sleep in the m48 nosler rifle?

 

[adrexco]

My accuracy node is at 78.5gr and 3075fps with a 26" benchmark barrel and win70 action.

What twist rate is your barrel?

 

[SnakeRiverEric]

What twist rate is your barrel?

1:9 twist no issue stabilizing the 195 EOL at 6000+ft where I live and hunt.

my coal is 3.600", 0.050 off lands, using cci 250 primers. 50 off shot just as well as 10 off in this rifle.

 

[Longrangec]

Has anyone tried the new 205 alco for the 7mm with crazy high bc