28 Nosler Sanity Check Please

[Mr6.5]

Tomorrow I am going to try the 175gr Maker T-Rexx copper bullet in my 28 Nosler. There is no load data for this anywhere. I used Hammer and Barnes data along with QL data and came up with N570 at a starting load of 74gr. I loaded a string from 74 to 82 in one grain increments. Anyone see this as an issue? My OACL is 3.4550.

 

[TackDriver284]

Mono bullets are recommended to be seated off the lands at .050".
How was your results on your tests?

 

[Mr6.5]

Hey Mark, Today went very well. I worked from 74 to 82 grains letting the rifle cool in the truck AC between strings. I found mild signs of pressure at 82grs of N570 (tight bolt lift), backed off and shot a group with the 81gr loads, 1/2 MOA! As this is a deer rifle that is perfect and will be the load I hunt with this coming season.


28 Nosler Custom Savage 116 Rifle SAMMI Chamber
27” 1:8 twist barrel (X-Caliber)
Powder Tested: Vihtavuori N570
Bullet: Maker 175gr T-REX
COAL: 3.455
TEMP: 80 Degrees F
ALT: 97ft ASL

Starting Load
74gr 2989 FPS
75gr 3048 FPS
76gr 3099 FPS
77gr 3148 FPS
78gr 3189 FPS
79gr 3256 FPS
80gr 3309 FPS
81gr 3364 FPS (MOST ACCURATE LOAD) .497 at 100Yards MAX SAFE LOAD in my rifle
82gr Heavy bolt lift MILD OVER PRESSURE SIGNS SHOWING