barefooter56
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Mudrunner,
Its in there now sir!
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Berger to introduce 7mm 195 gr EOL Hybrid Hunting Bullet
- Thread starter Eric Stecker
- Start date
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Its in there now sir!
barefooter56
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Mudrunner,
Its in there now sir!
MudRunner2005
Well-Known Member
Good to know. Thanks Phil.
I must need a new computer. It's not there when I look.
MudRunner2005
Well-Known Member
They did put it in the Ballistics Calculator, but they did not put it in the twist stability calculator.
Phil, this calculator still does not have the 7mm 195.
Twist Rate Stability Calculator | Berger Bullets
barefooter56
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Ed, Mudrunner,
Its listed in the BALLISTICS CALCULATOR but evidently not the twist rate calculator yet. Use the 7MM 195 EOL G7 BC and bullet length and the bullet length is 1.648. So plug these two into the twist rate calculator and you are good to go. The 7mm 195 EOL is the last bullet listed in the 7mm category in the BALLISTIC CALCULATOR.
barefooter56
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Guys,
Will get the 7mm 195 EOL data into the TWIST RATE CALCULATOR as soon as we can. Our apologies for this inconvenience.
In the mean time, you can run this bullet in the twist rate calculator using the weight, caliber, and length of 1.648. The Berger QRS is updated with all the most recent dimensions including the length of this bullet: http://www.bergerbullets.com/pdf/Quick-Reference-Sheets.pdf
You can calculate stability for any bullet using that calculator so long as you know it's metrics, length typically being the most difficult to find.
-Bryan
You can calculate stability for any bullet using that calculator so long as you know it's metrics, length typically being the most difficult to find.
-Bryan
I measured 10 or so of my 195's and got 1.618-1.625" for length and the 1.625" bullet had a rough metplat. Most were 1.619-1.621. I'm not sure .028" or so will matter that much for most people but others have measured them and got basically the same 1.62" length.
DocUSMCRetired
Well-Known Member
Instead of measuring the tip, measure the ogive. A consist ogive is what you are looking for.
DocUSMCRetired
Well-Known Member
Yes OAL is important for the twist rate. But when you are looking at quality, I would be more concerned with variances in ogive length. My comment was more geared towards the not being sure about the 0.028" being an issue.
The .028" was the difference in the average length I measured (1.620") versus what Bryan listed (1.648") not the variance in the OAL I measured from the bullets I have. The OAL difference I saw was only .007" and that was due to a rough metplat on the longest one. Most were within .002". What I wasn't sure about, because I didn't spend the time to run it through the calculator, was the effect the .028" difference would make on stability. I doubt it's much or even noticeable unless your already on the ragged edge.
Jordan Smith
Well-Known Member
I measured several of mine as well, and I get an average of 1.627".
I do know that the bullet will stabilize enough not to keyhole at 100 meters from a 7WSM 9.5" twist at 2700 fps, at 4500 feet ASL (26.7 InHg) and 60def F. It'll also stabilize in a 7-08 at 2400 fps and 9" twist at 2500 feet ASL. The same 7-08 load in a 9.5" twist was a no go. Keyholing evident in the target at 100 meters.
I do know that the bullet will stabilize enough not to keyhole at 100 meters from a 7WSM 9.5" twist at 2700 fps, at 4500 feet ASL (26.7 InHg) and 60def F. It'll also stabilize in a 7-08 at 2400 fps and 9" twist at 2500 feet ASL. The same 7-08 load in a 9.5" twist was a no go. Keyholing evident in the target at 100 meters.
