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.1 grain of powder

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Post by shooterk Tue Jul 18, 2023 1:48 pm

Does .1 grain of powder make a big difference in 45 ACP @ 50 yards.  My Dillon Square Deal will not throw consistant loads. Target is 4.1 but it drops a few @ 4.2

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Post by gjoyce3 Tue Jul 18, 2023 1:52 pm

Nothing I would be worried about.  Many set reloaders set powder measure based on an average of at least 10 samples - exactly to account for such variances.  For me, a .1 variance is well within acceptable limits.

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Post by dannyd93140 Tue Jul 18, 2023 2:04 pm

Tap the hopper before pulling the handle, that may help.
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Post by Wobbley Tue Jul 18, 2023 2:40 pm

Sorry for it being upside down, but these two targets were when I shot up some leftover chronographing ammo.  The loads were 3.8, 4.0, and 4.2 of two powders Bullseye and 452AA.  The gun isn’t a full-up “Bullseye” gun but the accuracy is at least equivalent to a Springfield RO.  Anyway, the shots outside the main group were called.  Since I was just using up ammo, I didn’t adjust zero.  But the upshot here is that there was .4 grains difference in the loads and they still shot well.  A .1 or .2 grain difference won’t amount to much.
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Post by chiz1180 Tue Jul 18, 2023 2:44 pm

A good gun will shoot a range of loads well. In my testing my gun shot 3.9-4.1 in the same roughly 2" group at 50 from a ransom rest, of the 9 total loads (different powder/bullets) I tested they all averaged 2.5". Clearly this was my gun and ammo that I loaded, your gun and loads may have different results.

Not sure what powder you are using but some powders also meter better in some powder measures than others.
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Post by shooterk Tue Jul 18, 2023 3:01 pm

Just getting back into Bullseye. Forty years ago Uncle Sam provided all the ammo I wanted and it shot well in our pistols. Now I have to roll my own. Great information from all, appreciated.

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Post by TonyH Tue Jul 18, 2023 11:30 pm

Makes no noticeable difference in my experience…..spend your time perfecting trigger control and sight alignment. Far greater dividends.
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Post by rburk Wed Jul 19, 2023 12:34 am

What everyone else said above, your loads should work fine.  I also load 45 on an SDB.  Make sure you are using the small powder measure bar.  I load with WST, it meters very consistently.

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Post by dannyd93140 Wed Jul 19, 2023 6:18 am

I had a SDB 30 years ago cost me 189.00 shipped from Dillion.
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Post by shooterk Thu Jul 20, 2023 6:00 pm

Dumped powder in 10 case then weighed total. Ended up @ 4.097 grains average. I dont think I can get any closer to 4.1. Thank again for all the input.

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