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More Berger 300 Hybrid Gen 2 testing

 
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  #50  
Old 10-09-2011, 09:33 PM
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Join Date: Mar 2006
Posts: 161
Re: More Berger 300 Hybrid Gen 2 testing

RM,

Thanks, I'll give that a try.

I guess the reason I want more velocity is to get to a mile better. We have 1 mile shoots at our club, and while I've done well with the Sierra, I was hoping that this Berger bullet would work out a bit better for me.

Hunting with this load.........I'd be perfectly happy.
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  #51  
Old 10-10-2011, 09:46 AM
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Join Date: Jan 2008
Location: NW Montana
Posts: 802
Re: More Berger 300 Hybrid Gen 2 testing

The most accurate load I have tried for my 338 Edge is with RL 25. It's running 2880 fps with a 28 inch barrel . No pressure signs. I stopped using H1000 way to much variation lot to lot. My ES ,velocity and accuracy are better with RL25.I think my rifle may go over 2900 fps with the Bergers. The results I have had are with 300 gr smk.
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  #52  
Old 10-10-2011, 10:11 AM
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Join Date: Jul 2007
Posts: 261
Re: More Berger 300 Hybrid Gen 2 testing

Steelhead,

One thing to consider is that within a given barrel brand (and between brands) different barrels will produce different velocities even with precisely the same load. You may have a "slow barrel".

This is complete speculation regarding your specific situation but if your combination gets velocities that are consistently lower than you should achieve in a given case (meaning others actually get higher velocities regularly) this is likely due to the barrel/bullet fit solution.

Having said that, if your situation qualifies, swapping out barrels is easier said than done for a long list of reasons. However, it's important everyone is aware of the influencing effects of the barrel/bullet fit on velocity and more importantly consistent precision.

Regards,
Eric
__________________
To strengthen your shooting skills go to the range.
To strengthen the shooting sports take a non-shooter with you.

Berger Bullets
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  #53  
Old 10-10-2011, 10:45 AM
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Join Date: Mar 2006
Posts: 161
Re: More Berger 300 Hybrid Gen 2 testing

Highridge,

Thanks. Have you noticed any temperature sensitivity issues with RL25? In the past I have seen this with this powder, however, I know that Alliant changed some of the formulas to their various powders, like RL15, to be less temperature sensitive, so this may have happened with RL25 also.

Eric,

I may indeed have a 'slow' barrel. I'm going to shoot some of these loads out to 300 and 500 and see what happens. If I remember correctly when I was developing my Sierra load it seems like my chrono was lying to me and my velocity was a lot faster. (either that or the BC value I used was way off). I seem to remember after shooting for groups at 300 and 500 and then entering how many inches off the aiming point I was, the Exbal program, altered my velocity by a significant amount. It was really strange to me at the time, but the new velocity value has been pretty much spot on out to 2000 yards.

Hopefully I can report back soon on my results. If the computer models that I've ran are correct, than this bullets going to be my goto bullet for these long range shoots.
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  #54  
Old 10-10-2011, 11:12 AM
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Join Date: Jul 2007
Posts: 261
Re: More Berger 300 Hybrid Gen 2 testing

Steelhead,

You bring up a great point that everyone reading needs to understand as well. All chronographs can suffer from error for many reasons. If it is possible to test over two different chronographs this can go a long way to confirming (or not) your results.

Like changing barrels, shooting over two chronographs is easier said than done which is why your comments on trajectory calculation are also important for everyone to understand.

If your (anyone's) trajectory predictions don't match observed results it may not be due to inaccurate BC data. Inaccurate MV due to chronograph error realities is the leading cause of trajectory prediction confusion (unless the published BC of a given bullet is inaccurate).

Regards,
Eric
__________________
To strengthen your shooting skills go to the range.
To strengthen the shooting sports take a non-shooter with you.

Berger Bullets
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  #55  
Old 11-28-2011, 04:17 PM
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Join Date: Mar 2006
Posts: 161
Re: More Berger 300 Hybrid Gen 2 testing

Sorry for the late response. I've been working with these bullets since my last post and finally have some "long" range results.

Since my last post I played around with different charge weights and seating depths and have come to the conclusion that even though I don't get my best accuracy at 100 yards with this load, it is the best for long distance shooting.

The load is 92 gr of H1000 with the 300 gr Berger. Ironically this is the same load as I use with the Sierra's. As for seating depth, I found that I get better results with the bullet touching the lands. Although I did run a quick test with 3 rounds to see what would happen if I seated the bullet so I could get the cartridge to fit into the magazine. These particular rounds functioned fine, with no signs of pressure and the accuracy at 100 was about the same as the load with the bullet touching the lands. I'll probably play around with this more in the future.

"Real World Results" were excellent. A week ago I decided to test the 92 gr load again at 300 yards. This load gives me around 2860 fps from a 30" barrel. The results I got were a 1/2moa group with three rounds. Seeing this, I then decided to use the last 2 rounds on a 700 yard gong, just to see what they would do and to see if my program on my PDA was on. As it turned out I used what the PDA told me and both rounds hit in the center of the 700 yard gong. I didn't take a measurement, but it was very impressive group for that far away.

Then on Friday, the day after Thanksgiving, my club had a 1 mile shoot. I decided to go with the 92 gr load using the 300 gr Bergers, instead of my usual Sierra load. This proved to be a good choice!

The way the shoot works is we usually start at around 1200 yards, take 5 shots, and then work our way back to 1500, then 1760, then 2000 yards. The targets are 4' x 4' square and 2' x 2' square AR500 steel.

The wind was terrible that day. It was averaging 10 - 12 mph with 20 mph gusts and was bitter cold. We decided to start out at 1400 yards, because of the bad conditions and the fact that most of us hit with every shot at 1200 yards at the last shoot. The wind coming at us from the 1 to 2 o'clock position. The terrain was fairly flat until around the 1000 yard mark where the bullet would then fly across a small gully maybe 10 or 20 feet deep, then the terrain went uphill sharply to the target. This made reading the wind very tricky. At the target itself, you could see the wind coming down the hill, which equated to a 1 moa up correction at 1400 yards and almost 2 moa up correction at 1760 yards. The wind in the gully area was swirling and wreaked havoc on those who weren't paying attention to it. The wind was a major factor and took some of our top shooters from the last 1 mile shoot out of the top spots at this event.

My partner was excellent in calling the corrections to me. In fact, once I hit on the second try, he was yelling at me to get the rest off quickly so that I didn't even have time to see where my hits were going. At the 1400 yard mark I barely missed to the right of the 4' x 4' target, but with the corrections hit on the next 4. We decided that we'd try the 2' x 2' target and both of us hit on our 2nd try. No one else in the group tried to hit this target.

At 1760 (1 mile) the same thing. I missed the first two, but on the last three shots, I hit all of them, but did not see where they went because of my spotter was pushing me to get them off fast again.

After I was done, one of the guys came up to me and told me that I had a very nice group on the target. This was very good to hear, as I had no idea where any of them landed.

Another thing I noticed was even though I needed to correct my elevation up for the down winds we were experiencing, my elevation was around 4 MOA lower than the same dope I use for the 300 gr. Sierra's.

Needless to say, I'm really liking these new Berger bullets. Going into this shoot somewhat blind, because I hadn't even practiced with this load at these distances, had me a bit concerned, but I actually managed to pull out a win. (I didn't really win anything except bragging rights until the next shoot ;-) ) But I'm very please with how these bullet performed in that wind. I can't wait to try them out on a calm day and not have my partner yelling at me to get them off fast. :-)
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