17 Mk IV

The 17 Mk IV is probably the most efficient 17 caliber around. There are many which use a smaller case and others that use a much larger case. They all work, of course, but the bigger the case the less efficient it becomes. Anyone who is interested in the various 17 calibers, would be wise to get Dick Saunders handbook. It has extensive data on many 17 caliber wildcats.

Shooting and loading the 17 is not as troublesome as it used to be. In the past, one of the worse things about this caliber was the hassle in keeping the barrel clean. Nowadays, with excellent match grade barrels available from a number of reputable makers, which do not seem to foul as bad as the normal ones available on factory rifles in the past. Plus the fact that NECO has come up with the idea of coating the bullets with molly, loading for the 17 is no longer any worse than loading for any other caliber. There is one fact that should be born in mind with this caliber though. VERY small charge increases can cause both velocity and pressure to creep up.

In my load development for this rifle, I used increments of 0.3 of a grain increases in the powders charge. This seems to work very well with this case size.

There is a number of other powders that are suitable for the 17 Mk IV, which I have not tried. My intention was to develop a decently accurate load at some reasonable velocity. My own goal was to find a load that would shoot in the 2s with a velocity of around 3600-fps. When this was achieved, I stopped load development.

The rifle had a HALL single shot action, # 719, JEWEL BR trigger, the barrel is stainless steel, 24 inches long, and fluted. I mounted a BAUSCH & LOMB Elite 4000 6-24X scope in JEWEL live center rings on KELBLY bases.

All loads were with the BERGER 30 grain HP bullet, molly coated. Primers were WINCHESTER SR and the cases formed from REMINGTON 221 FIREBALL brass. The bullets were seated to just touch the rifling in this case 1.860". Hopefully, sometimes in the future, I will try some of the lighter bullets in this rifle. All shooting was done off the bench in an underground shooting tunnel.

POWDER

VELOCITY

GROUP

NOTES

 

 

 

 

13 H4198

2894

0.133

3 SHOTS FIRE FORMING LOAD

 

 

0.166

5 SHOTS FIRE FORMING LOAD

 

 

 

 

13.5 H4198

2968

0.449

 

13.8

3001

0.189

 

14.1

3053

0.234

 

14.4

3178

0.279

 

14.7

3227

0.545

 

15.0

3293

0.234

 

15.3

3322

0.360

 

15.6

3387

0.336

 

15.9

3453

0.326

 

16.2

3546

0.622

 

 

 

 

 

14.5 RELOADER 7

3141

0.513

ERRATIC VELOCITIES THIS POWDER

14.8

3186

0.850

 

15.1

3249

0.596

 

15.4

3397

0.421

 

15.7

3463

0.468

 

 

 

 

 

14.0 VVN 130

2953

0.420

 

14.3

3008

0.299

 

14.6

3083

0.371

 

14.9

3179

0.327

 

15.2

3225

0.244

 

15.5

3266

0.398

 

15.8

3295

0.634

 

16.1

3388

0.491

 

16.4

3468

0.357

 

16.7

3529

0.332

 

17.0

3592

0.352

 

17.3

3655

0.255

 

17.6

3710

0.313

 

17.9

3778

0.609

 

15.0 VVN 133

2960

0.476

POWDER IS TOO SLOW

15.5

3059

0.190

 

16.0

3166

0.365

 

16.5

3304

0.338

 

17.0

3336

0.264

 

17.5

3433

.322

 

 

 

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Last updated 30 June 2000