Recovered bullet pictures

[alinwa]

We had some seriously wintry weather here this year so of course I had to take advantage of our rare "powder snow".....

I fired a moly coated Berger 115 and a nekkid Euber 108 into a snow bank, both of them traveling at 3100fps....... I structured this as an "inbore yaw experiment" and fired them from cases which have .008 (included) neck clearance. The neck clearance/yaw experiment was inconclusive but I still got cool bullets back.

These were fired through an 8-groove Shilen, 3100fps from my 6X47L. Interestingly the grooves all have a very easily felt burr, all burrs are consistent and I'll guess them at less than a thousandth tall but easily felt with the fingernail and "saw-edged" enough to feel rough when running the finger along them.

I did measure the length of the grooves in the interest of my experiment.....


Length of grooves:

Euber 108 naked lengths ranged from .512 to .519 with the range being as follows (measured in order.) This "could" indicate tippage.

-.515
-.516
-.519
-.516
-.512
-.516
-.517

Berger moly lengths ranged from .562 to .572 with the range being as follows. (measured in order)

-.572
-.571
-.567
-.564
-.566
-.562
-.563
-.564


Inconclusive, but again, could indicate some tippage.


Close inspection shows no evidence of blowby.


Also no scorching on the rear of the bullet.....this is a little weird because when fired without powder the PRIMER seriously blackens the tail. The moly did remain intact from impact with the snow but like all others I've recovered there's no trace left on the bearing surfaces.


Just thought someone else might be interested


al

 

[Roger T]

Nice job. Must be real soft snow cause I see no tip deformation either. BTW how far did you have to dig for them ? Question why does the Euber only have a 7 groove count ,while the Berger has 8. Going by the difference of opposit grooves the Berger has .006 .009 .004 .000. What would explain the .008 difference between adjacent grooves? Your #1 and #8.

 

[alinwa]

Nice job. Must be real soft snow cause I see no tip deformation either. BTW how far did you have to dig for them ? Question why does the Euber only have a 7 groove count ,while the Berger has 8. Going by the difference of opposit grooves the Berger has .006 .009 .004 .000. What would explain the .008 difference between adjacent grooves? Your #1 and #8.

The trick is to shoot into feathery soft snow, the 25-30degree stuff that falls in big flakes and no drifting. The bullets traveled about 8 feet.

Nahhh, I just forgot to write in one number

As per the difference between adjacent grooves...... I'm not sure. It seems that if it were a high land it'd show on the other bullet. BUT, it may well BE on the other bullet just not as apparent because of the difference in ogive.


BTW the grooves are visibly longer on one side of the Berger when you roll the bullet around.

I don't really intend to speculate at this point, it was steenking COLD and blowing and dark as the inside of a cow, I was rushed to beat the drifting. Next time I'll have 5 each loads ready to go! My real problem was that I didn't have my plywood laid out to catch the bullets and I just fired them alongside a wall over a barkdust flower bed area. I was testing to see if I could find them as much as anything! This is the first time I've used feathery snow at point blank range....... we normally recover from the 200-300yd line where we've fired into banks of snow. This was kinda' cooler, just step outside and fire into the flower bed. Only problem is muzzle blast clearing the snow! I couldn't fire too many more bullets into my limited area. I did do one 55gr Ballistic Tip from my 6BR just to see........ it frag'd!


LOL


al

 

[Lynn]

Alinwa

Al
On the long Berger bullet with the 0.010 of difference did you measure the bullet to see if it is banana shaped? I can't see the 0.010 number working well unless its a banana shaped bullet giving you that number.
Maybe you can contact(H.B.C.)The Bullet God in Louisianna and get his take on it then share his thoughts with us here?
Lynn

 

[alinwa]

Al
On the long Berger bullet with the 0.010 of difference did you measure the bullet to see if it is banana shaped? I can't see the 0.010 number working well unless its a banana shaped bullet giving you that number.
Maybe you can contact(H.B.C.)The Bullet God in Louisianna and get his take on it then share his thoughts with us here?
Lynn

Yes it's slightly banana'd, not enough to account for all of the length variation but somewhat. I don't really have a way to measure or quantify it.

I'm not really going to analyze it until I get at least 5 rds to measure up. I just thought it was cool enough to post pix.

I am going to section the bullets though and see where the core is, look for evidence of melting etc......


al

 

[.25shooter]

Hey this is neat

You can use those bullets again