Roberts Ackley Improved

There are several "improved" versions ofthe .257 Roberts of which the .257 Ackley Improved is the most popular. The Ackley design has a 40° shoulder which increases case capacity to the maximum practical amount.

The .257 Ackley Improved is an excellent long-range varmint cartridge and is also suitable for most North American game.

There is no SAAMI pressure limit for the .257 Roberts Ackley Improved. We developed our loading data to the same pressure level as the .25-06 Remington.

.257 ACKLEY IMPROVED (40°)

Gun

DOUGLAS

Max Length

2.233"

Barrel Length

26"

Trim Length

2.313"

Primer

CCI 200

OAL Max

--

Case

REM

OAL Min

--

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length

Comment

SRA 75 HP

2700

50.4

3435

2700

53.0

3654

59,100

2.790"

4350

49.5

3213

4350

55.0

3651

58,900

3100

50.4

2966

3100

56.0

3371

45,600

8700

54.9

2496

8700

61.0

2836

37,000

Compressed

BAR 85-X

2700

48.5

3230

2700

51.0

3436

60,500

2.865"

4350

47.7

3056

4350

53.0

3473

61,700

3100

50.4

2931

3100

56.0

3331

53,000

8700

54.9

2435

8700

61.0

2767

40,200

Compressed

SRA 90 HPBT

2700

46.6

3100

2700

49.0

3298

57,400

2.835"

4350

47.7

3021

4350

53.0

3433

59,900

3100

50.4

2907

3100

56.0

3303

53,200

8700

54.9

2448

8700

61.0

2782

40,600

Compressed

NOS 100 BT

2700

46.1

2991

2700

48.5

3182

59,600

2.945"

4350

46.4

2886

4350

51.5

3279

61,600

3100

49.5

2825

3100

55.0

3210

56,600

Compressed

8700

54.9

2380

8700

61.0

2705

39,500

Compressed

START LOADS

MAXIMUM LOADS

Cartridge

Bullet

Powder

Grains

Vel.

Powder

Grains

Vel.

P.S.I.

Length

Comment

BAR 100-X

2700

47.5

3008

2700

50.0

3200

59,900

2.885"

4350

46.8

2898

4350

52.0

3293

61,100

3100

49.5

2798

3100

55.0

3179

55,200

8700

54.9

2376

8700

61.0

2700

42,100

Compressed

NOS 115 (Part)

2700

44.7

2831

2700

47.0

3012

61,400

2.945"

4350

44.6

2685

4350

49.5

3051

60,200

3100

48.6

2727

3100

54.0

3099

59,800

Compressed

8700

54.9

2384

8700

61.0

2709

42,700

Compressed

SPR120 SBT

2700

44.7

2790

2700

47.0

2968

63,500

2.920"

4350

44.6

2660

4350

49.5

3023

61,700

3100

48.6

2689

3100

54.0

3056

60,000

Compressed

8700

54.9

2364

8700

61.0

2686

43,000

Compressed

Hunting Mastery Selected Tips

Hunting Mastery Selected Tips

Deer hunting is an interesting thing that reminds you of those golden old ages of 19th centuries, where a handsome hunk well equipped with all hunting material rides on horse searching for his target animal either for the purpose of displaying his masculine powers or for enticing and wooing his lady love.

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