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204 testing

 
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  #15  
Old 04-17-2013, 04:44 PM
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Join Date: Nov 2007
Location: Near Mt Rainier
Posts: 221
Re: 204 testing

I have tried the Hornady 40gr V-Max and 40gr Nosler B-tip at 300 and 400 yards at the range on still days. I can't find anything wrong with these bullets but I have chosen to use the 39 gr Sierra because it claims the highest BC. I have not tested the BC to verify this. I have made the 32 gr bullets go fast. 29 gr of IMR 8208 will make 32 gr Sierras go more than 4300 in my 26 inch barrel. I have focused on the 40gr bullets because they are slightly more wind resistant.

I have tested VV N-530, N-540, IMR 3031, 4895 and 4064, H-335, Reloader 15 and have found that IMR 8208 is the most consistant. The Vihtavuori powders are fast but the SD is greater than with IMR 8208. Hodgdon says that IMR-8208 is the best powder they have ever tested. That covers a lot of recipes. See the article:
SHOT Show Report: Chris Hodgdon Sets the Record Straight Regarding IMR 8208 XBR Daily Bulletin


The target group is Hornady V-Max (HBN coated) in front of 28.6gr of IMR 8208 at 300 yards. Turn the target so the nickel is upright.
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  #16  
Old 04-17-2013, 05:13 PM
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Join Date: Jan 2013
Location: Meridian, Idaho
Posts: 1,269
Re: 204 testing

Nice. I have several groups at .75" at 300 on calm days but with factory ammo. I hope the new loads will shoot as well, but hoping for better. We'll see. My 204 only has a 20 or 22 " barrel so I doubt I will see much increase in speed.
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  #17  
Old 04-17-2013, 07:44 PM
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Join Date: Mar 2013
Posts: 68
Re: 204 testing

mine liked H335 with the 40g vmax. really the only thing that hasn't shot good for me is the 30 gr hornady factory stuff. it was screamin' fast, but wouldn't shoot less than about 1 3/4 at 100. i finally rounded up some 39g sbk bullets, but have kindly been waiting to see if i could find some remington primers before i load any of them up.
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  #18  
Old 04-18-2013, 11:13 AM
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Join Date: Nov 2007
Location: Near Mt Rainier
Posts: 221
Re: 204 testing

Why Remington primers? When I compared the mass of 50 of each of the CCI BR2, CCI 400, Fed 205M, Regular Fed 205, Russian Wolf and Remington small rifle primers, the Federals were the most uniform and Remington the worst. The CCI BRs were almost as good as the Federal Match Both "match" primers were measurably more consistent than the regular primers. In both cases the average mass was the same for regular and "match" primers. This tells me that the amount of priming mix, the "pellet" is the same for regular and match primers. I used a Laboratory Balance at a Biotech Lab that has its own room. Note that both Federal (Minesota) and CCI (Idaho) are owned by Blackhawk.

The bench rest boys use 205Ms, end of story.

It is hard to beat the Nosler brass. They are sorted and the outliers discarded. They also can be annealed. I use the Forster Shoulder Bump Neck Bushing Die.
I use the Wilson seating die that was cut with my chamber reamer.
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  #19  
Old 04-18-2013, 05:06 PM
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Join Date: Mar 2013
Posts: 68
Re: 204 testing

the word over on the 204 forum is that the remington 7 1/2 is made with a thicker cup, and will show less overpressure signs than any of the others. it is pretty much accepted as the "only" primer for the 204 over there. i have always used fed primers, and have got the best groups with them on countless occasions, in many different cartridges. that being said, i have a box of winchester small rifles that i have been using for 223, and they are really "smashed" with very nominal loads in the 204. at the moment, i am finding NOTHING at any of my local haunts, and only found more winchesters at the last gun show, so i guess i am waiting it out, at the moment!
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  #20  
Old 04-18-2013, 05:08 PM
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Join Date: Mar 2013
Posts: 68
Re: 204 testing

i am definitely itching to try some nosler brass! but again, at the moment it is my slowly diminishing stock of hornady, or nothing!
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  #21  
Old 04-19-2013, 08:12 AM
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Join Date: Jan 2013
Location: Meridian, Idaho
Posts: 1,269
Re: 204 testing

I will see if I can find some 7.5's and try them out. I don't recall what my Hornady book was using for primers but I have had good luck with Fed Match so that I was use. Not real scientific about it ha ha.

The only primer I had that was FLAT as the one with 33 grains of super. 32 seems fine. Hope to test some more tomorrow.
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