.257 ROBERTS ACKLEY IMPROVED - Manufacturer Loading Data

Bullet
Type
Primer
Case
Trim
Length
C.O.L.
 
Starting
Max
Diam.
Source
 
GR.:  75 gr
Bullet Type:  HP 
(Sierra)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.790"
Powder:
50.4 gr
53.0 gr
Vel.:
3,435
3,654
Press.:
 
59,100
Starting Powder: 50.4 gr
Starting Velocity: 3,435
Starting Pressure:  
Max Powder: 53.0 gr
Max Velocity: 3,654
Max Pressure: 59,100
Diameter: 0.257"
Source: Accurate 
 
GR.:  75 gr
Bullet Type:  FNSP 
(Sierra)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.790"
Powder:
49.5 gr
55.0 gr
Vel.:
3,213
3,651
Press.:
 
58,900
Starting Powder: 49.5 gr
Starting Velocity: 3,213
Starting Pressure:  
Max Powder: 55.0 gr
Max Velocity: 3,651
Max Pressure: 58,900
Diameter: 0.257"
Source: Accurate 
 C 
 
GR.:  85 gr
Bullet Type:  X 
(Barnes)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.865"
Powder:
48.5 gr
51.0 gr
Vel.:
3,230
3,436
Press.:
 
60,500
Starting Powder: 48.5 gr
Starting Velocity: 3,230
Starting Pressure:  
Max Powder: 51.0 gr
Max Velocity: 3,436
Max Pressure: 60,500
Diameter: 0.257"
Source: Accurate 
 
GR.:  85 gr
Bullet Type:  X 
(Barnes)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.865"
Powder:
47.7 gr
53.0 gr
Vel.:
3,056
3,473
Press.:
 
61,700
Starting Powder: 47.7 gr
Starting Velocity: 3,056
Starting Pressure:  
Max Powder: 53.0 gr
Max Velocity: 3,473
Max Pressure: 61,700
Diameter: 0.257"
Source: Accurate 
 C 
 
GR.:  90 gr
Bullet Type:  HPBT GK 
(Sierra)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.835"
Powder:
46.6 gr
49.0 gr
Vel.:
3,100
3,298
Press.:
 
57,400
Starting Powder: 46.6 gr
Starting Velocity: 3,100
Starting Pressure:  
Max Powder: 49.0 gr
Max Velocity: 3,298
Max Pressure: 57,400
Diameter: 0.257"
Source: Accurate 
 
GR.:  90 gr
Bullet Type:  HPBT GK 
(Sierra)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.835"
Powder:
47.7 gr
53.0 gr
Vel.:
3,021
3,433
Press.:
 
59,900
Starting Powder: 47.7 gr
Starting Velocity: 3,021
Starting Pressure:  
Max Powder: 53.0 gr
Max Velocity: 3,433
Max Pressure: 59,900
Diameter: 0.257"
Source: Accurate 
 C 
 
GR.:  100 gr
Bullet Type:  TSX-BT 
(Barnes)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.885"
Powder:
47.5 gr
50.0 gr
Vel.:
3,008
3,200
Press.:
 
59,900
Starting Powder: 47.5 gr
Starting Velocity: 3,008
Starting Pressure:  
Max Powder: 50.0 gr
Max Velocity: 3,200
Max Pressure: 59,900
Diameter: 0.257"
Source: Accurate 
 
GR.:  100 gr
Bullet Type:  B-TIP 
(NOS)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.945"
Powder:
46.1 gr
48.5 gr
Vel.:
2,991
3,182
Press.:
 
59,600
Starting Powder: 46.1 gr
Starting Velocity: 2,991
Starting Pressure:  
Max Powder: 48.5 gr
Max Velocity: 3,182
Max Pressure: 59,600
Diameter: 0.257"
Source: Accurate 
 
GR.:  100 gr
Bullet Type:  TSX-BT 
(Barnes)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.885"
Powder:
46.8 gr
52.0 gr
Vel.:
2,898
3,293
Press.:
 
61,100
Starting Powder: 46.8 gr
Starting Velocity: 2,898
Starting Pressure:  
Max Powder: 52.0 gr
Max Velocity: 3,293
Max Pressure: 61,100
Diameter: 0.257"
Source: Accurate 
 C 
 
GR.:  100 gr
Bullet Type:  B-TIP 
(NOS)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.945"
Powder:
46.4 gr
51.5 gr
Vel.:
2,886
3,279
Press.:
 
61,600
Starting Powder: 46.4 gr
Starting Velocity: 2,886
Starting Pressure:  
Max Powder: 51.5 gr
Max Velocity: 3,279
Max Pressure: 61,600
Diameter: 0.257"
Source: Accurate 
 C 
 
GR.:  115 gr
Bullet Type:  PART 
(NOS)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.945"
Powder:
44.7 gr
47.0 gr
Vel.:
2,831
3,012
Press.:
 
61,400
Starting Powder: 44.7 gr
Starting Velocity: 2,831
Starting Pressure:  
Max Powder: 47.0 gr
Max Velocity: 3,012
Max Pressure: 61,400
Diameter: 0.257"
Source: Accurate 
 
GR.:  115 gr
Bullet Type:  PART 
(NOS)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.945"
Powder:
44.6 gr
49.5 gr
Vel.:
2,685
3,051
Press.:
 
60,200
Starting Powder: 44.6 gr
Starting Velocity: 2,685
Starting Pressure:  
Max Powder: 49.5 gr
Max Velocity: 3,051
Max Pressure: 60,200
Diameter: 0.257"
Source: Accurate 
 C 
 
GR.:  120 gr
Bullet Type:  SBTSP 
(Speer)
Primer: FED 210
Powder: 2700 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.920"
Powder:
44.7 gr
47.0 gr
Vel.:
2,790
2,968
Press.:
 
63,500
Starting Powder: 44.7 gr
Starting Velocity: 2,790
Starting Pressure:  
Max Powder: 47.0 gr
Max Velocity: 2,968
Max Pressure: 63,500
Diameter: 0.257"
Source: Accurate 
 
GR.:  120 gr
Bullet Type:  SBTSP 
(Speer)
Primer: FED 210
Powder: 4350 
(Accurate)
Case: REM
Trim Length:  
C.O.L.: 2.920"
Powder:
44.6 gr
49.5 gr
Vel.:
2,660
3,023
Press.:
 
61,700
Starting Powder: 44.6 gr
Starting Velocity: 2,660
Starting Pressure:  
Max Powder: 49.5 gr
Max Velocity: 3,023
Max Pressure: 61,700
Diameter: 0.257"
Source: Accurate 
 C 
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