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Would .001" really make a difference?


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Old 10-12-2013, 04:08 AM   #11
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One other thing.

The 147 in 9mm is running right at speed of sound so depending on the length of barrel may also be making that aweful transition to subsonic at useful handgun distance. This can also really play havoc with poi vs poa.

Just another reason I stick with 115 in 9mm.
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Old 10-12-2013, 04:12 AM   #12
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Quote:
Originally Posted by JonM View Post
One other thing.

The 147 in 9mm is running right at speed of sound so depending on the length of barrel may also be making that aweful transition to subsonic at useful handgun distance. This can also really play havoc with poi vs poa.

Just another reason I stick with 115 in 9mm.
i don't reload 9mm and strictly buy factory ammo for my 9mm, and i tend to gravitate to either the 115 or 124 gr. bullet weights. i shoot the cheaper FMJ for practice and keep JHP ammo for SD uses.
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Old 10-13-2013, 06:15 PM   #13
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I like the recoil impulse on the 147gr bullet better than 115 or 124gr bullets. I have two more boxes but they are sized at .356. I have about 300 of the .357 diameter bullets built. I'll either set the aside or take them out to blow through them plinking.

I don't normally shoot factory ammo in 9mm and have very little plated bullets for 115gr.
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Old 10-13-2013, 08:37 PM   #14
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Why would you set them aside or just blow through them? Just find a load that will shoot to POA like your other loads.
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Old 10-13-2013, 08:58 PM   #15
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They are already built. I went from one box of 147gr FP bullets to another and either didn't notice or didn't think that the .001" would make a difference. They are all loaded to 3.4gr Bullseye just the same as the ones I had built from the .356" box. The extra .001" must be slowing down my FPS and causing the difference in POI.
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Old 10-13-2013, 09:57 PM   #16
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It is not the size difference man. It really isn't. It is the load speed. your running slower with your lead loads than with jacketed loads.
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