LOAD DATA FOR 257 DGR           

All loads were fired across an Oehler 35p, with 4' spacing of the screens, 15 feet from the muzzle. Temperature was 88 degrees F.

      

Bullet Powder Grains Speed in Feet per Second
75gr Hornady V-MAX N550 VV 44 3407
    46 3507
    46.5 3600
    47.8 3671
    48 3691
    48.5 3722
  H414 50 3689
  760WW 50 3677
85gr Nosler BT N160 VV 48 3410
87gr Starke RL15 40 3139
    41 3197
    42 3266 still very mild
82.6gr Starke RPVB H414 48 3449
  760 WW 48 3454
    49 3507

These were fired with the same powder.

Bullet Powder Grains Speed in Feet per Second
85gr Nosler BT 760WW 48 3504
87gr Speer TNT     3412
87gr Starke BR     3407

THE NEXT 7 BULLETS WERE FIRED WITH THE SAME POWDER CHARGE TO SHOW THE DIFFERENCE BETWEEN BULLET SHAPES/BEARING SURFACE AND HOW IT AFFECTS LOAD DATA.

Bullet Powder Grains Speed in Feet per Second
87gr Starke BR 760WW 48.7 3454
87gr Hornady SP     3482
85gr Nosler BT     3526
85gr Combined Tech BST     3489
85gr Berger BR     3479
85gr Fowler BR     3513
87gr Speer TNT     3479

LOADS WITH 100 gr. BULLETS

Bullet Powder Grains Speed in Feet per Second
100gr Nosler BT N160 VV 46.4 3232
    47 3277 Max in this rifle
  760WW 45 3219
  H4350 44 3080 very mild
    45.2 3183
  H4831sc 47.5 3081 very mild
    48 3122 still mild load
100gr Sierra HPBT N160 46 3187
  760WW 45 3114
    45.7 3188
    46.3 3235
       
       

LOADS WITH 115 TO 117GR BULLETS

Bullet Powder Grains Speed in Feet per Second
115gr Combined Tech BST H4831sc 46.6 2879 very mild
  H4350 44 2987
117gr Hornady BTSP   44 2989
    45 3050
117 Hornady BTSP H4831sc 46.6 2906
    47.4 2949 still very mild
  N160VV 45 3036

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