Interesting. It says mine are in the mail box too. I can't wait to check them out. Twist is interesting for me. I shoot in 3 different areas ranging from 7200 ft to 1000 ft. When using the twist calculator, I can get away with just about anything twist wise at 7200, but at 1000, I can't get away with anything it appears. So I am just going to go for the 8 twist and be done with it I think.
Berger to introduce 7mm 195 gr EOL Hybrid Hunting Bullet
- Thread starter Eric Stecker
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Interesting. It says mine are in the mail box too. I can't wait to check them out. Twist is interesting for me. I shoot in 3 different areas ranging from 7200 ft to 1000 ft. When using the twist calculator, I can get away with just about anything twist wise at 7200, but at 1000, I can't get away with anything it appears. So I am just going to go for the 8 twist and be done with it I think.
esshup
Well-Known Member
It all depends on velocity I believe. Mine is 1 in 9, and I can stabilize the 200g Wildcat bullets at 780' elevation.
FWIW, a visual "look see" shows that the 195g Bergers are a hair longer than the 200g Wildcat bullets, and the bearing surface on the Berger bullets is less than what is on the Wildcat bullets.
Unfortunately it will be a few weeks until I can load/shoot them, my FL sizing die was sent back to get the neck polished - it was leaving vertical streaks on the case neck.
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trappers son
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- May 19, 2012
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Can't wait to hear some range reports, groups, velocities, and the like....
Measure a few when you get them. A lot of times their bullets are shorter than listed in their library.
I've played with Bergers stability parameters and found ,besides twist, actual length makes a difference in their predicted stability.
Buffalobob
Well-Known Member
A 1 in 9 twist is fine at my velocity and sea level for the original Wildcats. It will be interesting to see how the Bergers hold up to that level of velocity. As I remember it, they were made on J4 jackets.
Broz
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chuckhammer
Well-Known Member
I could see 28 Nosler making it to 3200 in a 28" tube with decent brass life using Reloader 33 or maybe Reloader 50. We need a Reloader 40. ☺
bigngreen
Well-Known Member
I thought I read that Kirby had put them to the stress test and they did fine, can't find where I saw it though.
Buffalobob
Well-Known Member
That's great that Kirby tested them. I have been conserving bullets trying to make my Wildcats last.
dah605
Well-Known Member
I did some preliminary tests tonight with my freshly rebarreled 7mm Rem Mag. All of the bullets this gun has seen are coated with hBN, including these ones.
Rifle details:
Remington 700 action, Hart 28" Sendero barrel 1:8 twist, NightForce ATACR scope, Manners EH1 stock, Rifle Basix trigger set to ~2.5 lbs, Harris S-BRM bipod
I emailed Bob Beck and he suggested starting 3-5 grains below the 180 grain Berger bullets. Up to this point, I had 27 rounds of 180 VLD target grain bullets down the barrel, with a very nice ES of 9 at 67.1 grains of H1000 at an average of 2798fps--this is above book max, but the throat is fairly long and I have lots of room in the case still. I'm using new Nosler brass and Federal GM215M primers.
I opted to start at 63.5 for the 195 grain bullets and went up in 0.5 grain increments. The bullets are seated to be 0.010 from the lands (2.765 to the ogive using my Hornady tool). These were all single shots to see where I would see any pressure signs. Up to this point, there have been no indicators of excessive pressure.
63.5 2598 fps
64.0 2619 fps
64.5 2645 fps
65.0 2695 fps
65.5 2695 fps
66.0 2720 fps
66.5 2736 fps
67.0 2757 fps
67.5 2767 fps
My next batch of testing will be with 68.0, 68.3, 68.6, and 68.9 in 3 shot groups. The only ones where there was a slight crunch of powder are the one loaded with 68.9 grains of H1000. I might be able to get back to the range tomorrow night, but if not, it will be more than a week before I can try these.
-David
Rifle details:
Remington 700 action, Hart 28" Sendero barrel 1:8 twist, NightForce ATACR scope, Manners EH1 stock, Rifle Basix trigger set to ~2.5 lbs, Harris S-BRM bipod
I emailed Bob Beck and he suggested starting 3-5 grains below the 180 grain Berger bullets. Up to this point, I had 27 rounds of 180 VLD target grain bullets down the barrel, with a very nice ES of 9 at 67.1 grains of H1000 at an average of 2798fps--this is above book max, but the throat is fairly long and I have lots of room in the case still. I'm using new Nosler brass and Federal GM215M primers.
I opted to start at 63.5 for the 195 grain bullets and went up in 0.5 grain increments. The bullets are seated to be 0.010 from the lands (2.765 to the ogive using my Hornady tool). These were all single shots to see where I would see any pressure signs. Up to this point, there have been no indicators of excessive pressure.
63.5 2598 fps
64.0 2619 fps
64.5 2645 fps
65.0 2695 fps
65.5 2695 fps
66.0 2720 fps
66.5 2736 fps
67.0 2757 fps
67.5 2767 fps
My next batch of testing will be with 68.0, 68.3, 68.6, and 68.9 in 3 shot groups. The only ones where there was a slight crunch of powder are the one loaded with 68.9 grains of H1000. I might be able to get back to the range tomorrow night, but if not, it will be more than a week before I can try these.
-David
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chuckhammer
Well-Known Member
Good numbers, thanks for sharing. I can see 2850 from your barrel with RL-33 as a max load.
trappers son
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- May 19, 2012
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that 67.0 and 67.5 charge looks like it might be a node due to the low velocity change..... you would only be able to verify that with velocity averages from multiple shots from each charge weight....I know it is only one shot each and it is not verifiable until you do more load work up but if you find an accurate group with low ES between those weights and there is not much velocity spread between charges, I bet it will be a real forgiving load and accurate.
