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  #1  
Old 10-30-2018, 09:14 AM
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Question Typical 17HMR accuracy



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Last edited by kisssofdeath; 07-24-2019 at 10:11 PM.
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Old 10-30-2018, 09:51 AM
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Quote:
Originally Posted by kisssofdeath View Post
What are you all seeing/getting for 50-55 yard accuracy out of your 17HMR guns? Preferably 5 shot groups. What ammo are you using?
Here is a nice comparison posted by dgeesaman elsewhere on RFC ...



Note that these are at 100 yards. Presumably, the 50 yard groups would be no larger, probably smaller.

I'm not as good of a shooter as dgeesaman, but in my limited experience, sub 1 MOA groups at 50 yards (approx. 1/2 inch) are easily achievable in 17 HMR.

Enjoy!
Dave
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Old 10-30-2018, 10:12 AM
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Depending on the ammo quality from CCI and Winchester,
anything from 0.1 inch to 2 inches at 50 yards for 5 shots.
The quality varies so greatly that you never know what will happen next.

200 yards, 50 shots









Apply the half-third rule of rimfire spread

200 yards 6 inches of spread
100 yards 2 inches
50 yards 0.67 inches

10 inches at 200
3.3 inches at 100
1.1 inches at 50

4 inches at 200
1.3 inches at 100
0.43 inches at 50

Between mv spread, canted bullets, irregular brass, primer inconsistencies
results on target can change box to box and shot by shot.

Last edited by jaia; 10-30-2018 at 10:24 AM.
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  #4  
Old 10-30-2018, 10:38 AM
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kissofdeath - With up to a 400fps difference in velocity within a box of 50, along with differences in bullet seating depth and overall quality in the manufacturing process I would expect flyers with anything CCI produces. I don't shoot any Winchester rimfire anymore so have no experience with that. For my current 17 HMR rifles ( a CZ 453 Varmint & Styer Zephyr II ) seem to prefer the TNT 17 gr loads or 20 gr game points. The Federal packaging seems to avoid "any" split case necks in my rifles but all the other CCI made stuff might see upwards of 35% split cases out of a box of 50 rounds. Obviously, YMMV as every barrel may react differently and box to box will vary as well.

I see that jala has contributed and defer to his comments and experience as well since he has done much more extensive distance testing than I have done and has posted pictures to show the 2-3 MOA results. My results for 50 yards are similar to his.
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Old 10-30-2018, 01:11 PM
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You cannot go wrong listening to jaia, but I have had generally more consistent results with my 17hmr. Probably just lucky to have latched onto better than average lots of ammo so far. As posted in the past, the CCI TNT and the Federal have produced consistently better groups than any others in my cz455 despite what you read about them all being the same. I cannot explain this unless CCI is producing the different brands to the individual brands specs, which is what they told me. If jaia says that isn't true, then it probably isn't true!

I thought that my results were going to be routine so I didn't bother to take pictures and I am so sorry about that. At 50 yards, the TNT was almost always sub moa and at 100, way more often than not. I just assumed that with practice they would shrink as I am only fair as far as accuracy.
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Old 10-30-2018, 02:00 PM
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I just received an order of 17 hmr from Graf's.
1 box of each of all the flavors available.
All will be sent downrange 200 yards, across a chronograph.
All the results will be available in the RFC Long Range forum 50 at 200 thread.

There are no guarantees of accuracy with either CCI or Winchester made rimfire.
If it goes bang and clears the barrel, it did it's job.
It's hunting ammo. Get close and then pull the trigger.

Last edited by jaia; 10-30-2018 at 02:04 PM.
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Old 10-30-2018, 03:08 PM
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Quarter size 5-shot groups at 50 yards w/ 17 grain Red Ballistic Tip Hornady; half-dollar at 100.

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Old 10-30-2018, 03:27 PM
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Wow, thanks guys this is great information. I will pull out my chronograph and see how consistent or inconsistent my ammo is. Accuracy wise mine did best with both Federal rounds. CCI, Winchester and Hornady were terrible. Like .75-1" at 55 yards terrible.
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Old 10-30-2018, 03:33 PM
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Itís been several years since I shot targets with mine,but it would consistently shoot Hornady v-max 3 rounds just under moa @ 100 yards on a dead calm day
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Old 10-30-2018, 04:41 PM
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Quote:
Originally Posted by jaia View Post
Depending on the ammo quality from CCI and Winchester,
anything from 0.1 inch to 2 inches at 50 yards for 5 shots.
The quality varies so greatly that you never know what will happen next.
Yeah that.
While I never had ammo that shot as poorly as 2" @ 50yds I do not doubt it, at all.
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Old 10-31-2018, 04:00 AM
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While I completely understand if some may think I'm exaggerating here, if I don't get groups under .5 center to center with my 452 Varmint, I'm surprised. It consistently shoots in the .3's and .4's at 50 yds, and lots of groups in the .2's with no wind.

I can pull out some old targets and post pics if needed, but my .17HMR 452 keeps up with my top shelf .22's after the trigger job and glass bedding was done.

Ammo? Some older Hornady 17 grain stuff. I bought 10 bricks of it several years ago for pennies on the dollar, and shoot a lot of paper just playin' around. The other brands I've tried shoot pretty much the same though.
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Old 11-04-2018, 06:11 AM
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If you have to have a 17 then get a hornet roll your own and can get .5 at 100yds. or under consistently. Have a Little CZ 527 American that is awesome lol as long as wind is kept to a minimum. After owning the Hornet will never own a HMR again.

P.S. It doesn't foul barrels nearly as bad as it's two bigger brothers either.

Last edited by Wyocaddis; 11-04-2018 at 06:52 AM.
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Old 11-04-2018, 06:33 AM
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Folks would do well to investigate the differences between canister grade and non-canister powders and then find out what the big manufacturers use.
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Old 11-04-2018, 10:57 AM
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Folks would do well to investigate the differences between canister grade and non-canister powders and then find out what the big manufacturers use.
Can you elaborate on the differences between the two?
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Old 11-04-2018, 11:58 AM
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A somewhat simplistic explanation but a start.

http://www.firearmtutorials.com/inde...anister-powder

Try Googling "canister verses non-canister powders", some good discussions will come up.
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