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Posted: 3/31/2018 10:23:51 PM EDT
[#1]
Quoted:
Like the title says, 168gr bullets are hitting my target 2” left than my 150gr bullets? Anybody have similar issue with a m1? |
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Posted: 4/1/2018 10:24:03 AM EDT
[#2]
Harmonics of your barrel are different with the 168grn than with the 150grn. Tweak your load until you find your sweet spot.
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Posted: 4/1/2018 11:01:40 AM EDT
[#3]
Quote HistoryQuoted:
Harmonics of your barrel are different with the 168grn than with the 150grn. Tweak your load until you find your sweet spot. Not unusual at all, for any rifle. Accurizing , things such as glass bedding, heavier or premium barrels, action truing , as well as the afore mentioned load tuning minimize the effect of harmonics. But it is always in play. Find the best grouping load, settle on it, then adjust the sights to it. |
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Posted: 4/1/2018 11:05:37 AM EDT
[#4]
I'm just impressed your Garand is shooting so well you can confidently recognize a 2" lateral shift.
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Posted: 4/1/2018 12:42:29 PM EDT
[#5]
I have seen the same thing in both rifles and pistols. This is why a data book record for zeros is so important. Just record what you need for zeros with different loads and reference the book when needed. I would simply put a couple clicks wind on when needed.
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Posted: 4/1/2018 8:16:20 PM EDT
[#6]
Quote HistoryQuoted:
I'm just impressed your Garand is shooting so well you can confidently recognize a 2" lateral shift. |
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Posted: 4/1/2018 11:03:10 PM EDT
[#7]
what distance?
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Posted: 4/1/2018 11:06:31 PM EDT
[#8]
Quote HistoryQuoted:
I'm just impressed your Garand is shooting so well you can confidently recognize a 2" lateral shift. 
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Posted: 4/4/2018 3:22:12 PM EDT
[#9]
This is not uncommon. Just recognize it and be able to repeat it.
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Posted: 4/6/2018 3:11:25 AM EDT
[#10]
Quote HistoryQuoted:
what distance? |
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Posted: 4/21/2018 1:43:22 AM EDT
[#11]
Comparing Federal 168 grain GMM to surplus ball ammo in my FAL I notice a similar shift to the left.
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Posted: 4/21/2018 2:32:59 AM EDT
[#12]
As stated earlier... harmonics difference but your 150 gr bullets are actually shooting 2" to the right of your 168's.
Sight in so 168's shoot 1" left of POA and 150's 1" right of POA and you are good to go. |
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