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Large POI between factory and my reloads
#6529252
11/06/16 09:39 PM
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Joined: Aug 2014
Posts: 446
hovercat
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I did a quick range trip to check my scope before hunting. I had zeroed the scope using my reloads. Since I only had a few loaded up, I tried some factory ammo first, and did not even put a hole in the 2' x 3' paper at 100 yards. Switched to the reloads and got a 3" group, just off a front rest. Is such a difference unusual?? I am puzzled but only have 3 centerfire rifles so not much of a sample. Savage 99, .308 win caliber. Factory ammo. Federal powershock 180gr soft point Reloads. 36.5gr h335 Lake City cases trimmed 2.005" Speer 165gr hot cor soft point 2.700 OAL CCI LR primer
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Re: Large POI between factory and my reloads
[Re: hovercat]
#6529271
11/06/16 09:46 PM
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Joined: Dec 2008
Posts: 41,173
J.G.
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Re: Large POI between factory and my reloads
[Re: hovercat]
#6529308
11/06/16 09:59 PM
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Joined: Aug 2014
Posts: 446
hovercat
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Re: Large POI between factory and my reloads
[Re: J.G.]
#6529384
11/06/16 10:39 PM
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Joined: Sep 2016
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Creedmoor
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Agreed. Not unusual at all.
. There's a fine line between BRAVE ... and STUPID.
The two most important days in your life are the day you are born and the day you find out why.
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Re: Large POI between factory and my reloads
[Re: hovercat]
#6529529
11/07/16 12:11 AM
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Joined: Oct 2008
Posts: 2,743
Murphscout
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In fact I would say a likely event. Especially considering the bullet difference and likely velo diff too.
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Re: Large POI between factory and my reloads
[Re: Creedmoor]
#6529545
11/07/16 12:22 AM
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Joined: Feb 2010
Posts: 2,289
watchale
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Agreed. Not unusual at all. Agreed as well.
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Re: Large POI between factory and my reloads
[Re: J.G.]
#6529590
11/07/16 12:40 AM
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Joined: Aug 2011
Posts: 6,179
Tactical Cowboy
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Re: Large POI between factory and my reloads
[Re: hovercat]
#6530200
11/07/16 12:35 PM
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Joined: Sep 2009
Posts: 18,951
ChadTRG42
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If you asked me before you shot these with the data you gave, I'd say you would have a large POI difference. The main issue is the velocity with your reloads. You are running a below minimum load with H335 and a 165 grain bullet (not sure why). You're probably around 2200-2300 fps, which is very slow. Then you do have a different bullet, which should only cause a small difference.
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Re: Large POI between factory and my reloads
[Re: ChadTRG42]
#6530319
11/07/16 01:46 PM
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Joined: Oct 2004
Posts: 39,544
redchevy
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If you asked me before you shot these with the data you gave, I'd say you would have a large POI difference. The main issue is the velocity with your reloads. You are running a below minimum load with H335 and a 165 grain bullet (not sure why). You're probably around 2200-2300 fps, which is very slow. Then you do have a different bullet, which should only cause a small difference. I have read savage 99's can be problematic when used with modern full power loads.
It's hell eatin em live
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Re: Large POI between factory and my reloads
[Re: hovercat]
#6530332
11/07/16 01:53 PM
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Joined: Sep 2009
Posts: 18,951
ChadTRG42
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Correct, you can't run full power 308 Win ammo in them. But 36.5 grain of H335 is a very light load.
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Re: Large POI between factory and my reloads
[Re: hovercat]
#6531790
11/08/16 01:07 AM
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Joined: Aug 2014
Posts: 446
hovercat
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My old Lyman manual gives a starting load of 43.0, max 47.5. NRA manual says reduce about 3 grains for thicker military cases. I started at 41 grains, and had trouble extracting. I ended up tapping out the case with a cleaning rod. So I pulled those loads, I had 3 cases loaded from 41 to 45 gr in 1/2 gr increments, and started again at 35-38gr. 36.5 gave me good accuracy over the iron sights, so I stopped there, since where I hunt 100 yards will be a long shot. Dropping the OAL from 2.800 to 2.700 seemed to make feeding easier. Only reason I can think of is that I might have a tight barrel. I have not slugged it, might do so after deer season.
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