6.5 ROBERTS IMPROVED

The following data was developed in a rifle based on a HALL action. Basically, all we did was open the 257 Roberts case neck to take a 264 caliber bullet, and gave it an Ackley Improved look.

All cases are Remington and Federal 210 primers.

All groups are 5 shots at 100 yards.

POWDER

VELOCITY

GROUP

BULLET

       

44.O VARGET

3167

1.556

NORMA 77 GR SP

46.0

3376

0.892

 

47.0

3474

1.992

 

49.0

3660

0.698

 

51.0

3751

1.226

 
       

40.0 VVN 135

2820

0.688

SIERRA 120 MATCH KING

41.0

2877

0.379

 

42.0

2948

1.034

 

43.0

3029

0.463

 

42.0 VVN 140

2914

0.679

 

43.0

2970

0.696

 

43.0 VVN 150

2895

0.437

 

44.0

2957

0.894

 

45.0

3019

0.342

 

46.0

3106

0.566

 

49.0 VVN 160

2973

0.524

 

50.0

3040

0.931

 

51.0

3063

0.243

 

52.0

3123

0.767

 

52.0 VVN 165

3015

0.566

 

53.0

3085

0.459

 

54.0

3158

0.470

 

42.0 RELOADER 15

2908

0.361

 

43.0

2935

0.518

 

44.0

2982

0.575

 

45.0

3067

0.578

 

46.0

3177

0.723

 

47.0

3241

0.508

 

50.0 RELOADER 19

3098 - 3092

0.348 0.398

2 GROUPS CONTROL

51.5

3145

0.350

 

52.5

3245

0.451

 

53.5

3320

0.821

 

52.0 RELOADER 22

3071

0.521

 

53.0

3158

0.430

 

51.0 H4831

0.456

3020

 

52.0

3089

0.326

 

53.0

3154

0.760

 

47.0 H4350

2950

0.276

 

48.0

3000

0.739

 

49.0

3081

0.231

 

50.0

3152

0.364

 

51.0 H450

3070

0.786

 

52.0

3126

0.584

 

46.0 H414

2892

0.444

 

47.0

2955

0.944

 
       

43.0 H4350

2570

0.227

SIERRA 140 MATCH KING

43.8

2650

0.411

 

44.6

2723

0.334

 

45.4

2794

0.452

 

46.2

2843

0.216

 

47.0

2897

0.906

 

43.0 H450

2551

0.690

 

44.0

2596

0.342

 

45.0

2642

0.647

 

46.0

2699

0.572

 

47.0

2770

0.385

 

48.0

2823

0.723

 

49.0

2844

0.768

 

50.0

2898

0.583

 

51.0

2976

0.723

 

52.0

3017

0.732

 

43.0 H414

2665

0.236

 

44.0

2733

0.454

 

45.0

2796

0.540

 

46.0

2864

0.414

 

47.0

2942

0.429

 

39.0 H4895

2669

0.434

 

40.0

2746

0.337

 

41.0

2804

0.407

 

38.0 VARGET

2598

0.381

 

39.0

2676

0.249

 

40.0

2734

0.352

 

41.0

2804

0.357

 

42.0

2816

0.629

 

43.0

2885

0.459

 

47.0 H4831

2766

0.469

 

48.0

2824

0.189

 

49.0

2895

0.326

 

50.0

2954

0.454

 

51.0

2962

0.645

 

39.0 RELOADER 12

2667

0.598

 

40.0

2695

0.324

 

40.0 RELOADER 15

2633

0.442

 

41.0

2683

0.401

 

42.0

2734

0.430

 

43.0

2828

0.586

 

47.0 RELOADER 19

2796

0.361

 

48.0

2862

0.737

 

49.0

2905

0.396

 

50.0

2964

0.650

 

51.0

3020

0.782

 

52.0

3081

0.673

 

49.0 RELOADER 22

2847

0.874

 

50.0

2923

0.8.26

 

51.0

2991

0.660

 

52.0

3042

0.701

 

47.0 VVN 165

2665

0.374

 

48.0

2724

0.425

 

49.0

2776

0.781

 

50.0

2859

0.636

 

51.0

2910

0.8.34

 

52.0

2977

0.335

 

53.0

3003

0.918

 

49.0 VVN 160

2857

0.944

 

50.0

2926

0.808

 

51.0

3066

1.432

 

44.0 VVN 150

2838

0.935

 

45.0

2933

0.512

 

46.0

2953

0.757

 

37.0 VVN 140

2531

0.359

 

38.0

2581

0.522

 

39.0

2631

0.489

 

40.0

2656

0.319

 

41.0

2719

0.464

 

42.0

2774

0.597

 

38.0 VVN 135

2636

0.404

 

39.0

2686

0.537

 

40.0

2739

0.564

 
       
       

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Last updated 31 January 1998