My thoughts on solid copper bullets and in comparison to other bullet types.

[xsn10s]

I remember reading his stuff years ago. Deemed it sketchy and tried to find out who he or she was. Looks like a fictitious writer. After that I didn't take anything he or she said seriously.

 

[fordy]

I guess you are better than the tester that works for https://www.nist.gov/ then.

I do not know an Aussie thing strictly, but I was stationed at RAF Lakenheath for nearly 4 years, and Brits say the same thing.

Gday feenix
Some may take that as a snide remark towards me but I don't it just makes the picture a little clearer imo of course
With respect I fail to see the relevance as what specifically was I making a statement on ?
No sir you didn't have a clue ( others may or may not ) & this is how the problem starts
So may I suggest you actually ask for clarification before you jump to conclusions
It's that simple
but then I'm not worried when I'm wrong either
I was wrong to not elaborate on the shared info just trying to shorten my responses up due to time constraints @ present but I can't function like a lot of people & also accept my inferiority in that field also


On the cheers that's interesting as coming from the convict colony I see a few have relocated back to the mother country & the word is spreading
It's a interesting word that can mean a lot of things & depending on how / where it's used it can mean different things
Cheers

 

[Bob Wright]

Can anyone nail down who Rathcoombe is?

Terminal Ballistics

(Click above for a Rathcoombe article....)
Relatively recent studies made by Rathcoombe.
Running around the net, experts in this field cannot converge very well on what kills what, how. I would say, if you like it, use it until proven otherwise by yourself. No one will have an exact, "end of conversation" answer. The variables go to infinity.
I have 7mm Hammers planned for part of the hunt. Berger 180 for the other. It's all about the "brackets" these two fit in.

 

[FEENIX]

Gday feenix
Some may take that as a snide remark towards me but I don't it just makes the picture a little clearer imo of course
With respect I fail to see the relevance as what specifically was I making a statement on ?
No sir you didn't have a clue ( others may or may not ) & this is how the problem starts
So may I suggest you actually ask for clarification before you jump to conclusions
It's that simple
but then I'm not worried when I'm wrong either
I was wrong to not elaborate on the shared info just trying to shorten my responses up due to time constraints @ present but I can't function like a lot of people & also accept my inferiority in that field also


On the cheers that's interesting as coming from the convict colony I see a few have relocated back to the mother country & the word is spreading
It's a interesting word that can mean a lot of things & depending on how / where it's used it can mean different things
Cheers

.

 

[jasent]

This thread is a roller coaster. Why do folks get so emotional about anything said that could be construed as negative about their favorite bullet? The only downside I can see to shooting monos is that some of them cause emotional outbursts. Personally I'll just continue to use what works for me and won't be upset if I'm the only guy that likes em.

 

[FEENIX]

This thread is a roller coaster. Why do folks get so emotional about anything said that could be construed as negative about their favorite bullet? The only downside I can see to shooting monos is that some of them cause emotional outbursts. Personally I'll just continue to use what works for me and won't be upset if I'm the only guy that likes em.

 

[xsn10s]

Terminal Ballistics

(Click above for a Rathcoombe article....)
Relatively recent studies made by Rathcoombe.
Running around the net, experts in this field cannot converge very well on what kills what, how. I would say, if you like it, use it until proven otherwise by yourself. No one will have an exact, "end of conversation" answer. The variables go to infinity.
I have 7mm Hammers planned for part of the hunt. Berger 180 for the other. It's all about the "brackets" these two fit in.

Thanks for the link Bob. Like I said I read that article years ago. I found it sketchy and when I do I look for the source of the ideas/ information. If I cannot find out that the source is reliable I don't waste my time with it. It's just the way I do things. The author already stated that they haven't killed that many big game. He or she does claim to have "seen" many taken and has field dressed them. Again without knowing who they are it really doesn't mean much. To me at least.

 

[xsn10s]

This thread is a roller coaster. Why do folks get so emotional about anything said that could be construed as negative about their favorite bullet? The only downside I can see to shooting monos is that some of them cause emotional outbursts. Personally I'll just continue to use what works for me and won't be upset if I'm the only guy that likes em.

I have to agree. IMO monos or non lead bullets kill in similar ways to cup and core. Some were made to penetrate completely through for dangerous game. While others were made for fragmentation and complete pass through. And finally some non lead bullets were made for complete fragmentation. We see the same concepts for cup and core bullets.

 

[jasent]

I have to agree. IMO monos or non lead bullets kill in similar ways to cup and core. Some were made to penetrate completely through for dangerous game. While others were made for fragmentation and complete pass through. And finally some non lead bullets were made for complete fragmentation. We see the same concepts for cup and core bullets.

Exactly. Which ever tool works for you use it.
There is such a huge wealth of knowledge and experience in this forum but most won't be able to absorb it due to its presentation. Could be the best medicine in the world but no one wants it when it's served with vinegar

On the other side it's great we have so much passion for our wonderful life style of hunting and shooting.

 

[nralifer]

An LRH member was nice enough to volunteer to conduct bullet analysis and share the following copper bullets noted in the spreadsheet. Cheers!

Bruker Nano GmbH, Germany
Quantification results
Mass percent (%)
Date:
Spectrum	Cu
BARLRX_308200 21.spx	99.41
BD2_26125 20.spx	99.31589​
BD2_26125 19.spx	99.24028​
BARLRX_308200 22.spx	99.17328​
CBB308168 17.spx	99.14582​
CBB308168 18.spx	99.08929​
HAM308178 11.spx	99.07997​
HAM25117 15.spx	99.01849​
HAM308178 3.spx	98.99935​
HAM25117 16.spx	98.89941​
HAM308178 12.spx	98.79048​
CYG25117 14.spx	98.78272​
HAM308178 4.spx	98.72898​
CYG25117 13.spx	98.69757​
HAM25117 5.spx	98.66783​
CYG308178 10.spx	98.64048​
HAM25117 6.spx	98.62495​
CYG308178 9.spx	98.60255​
CYG308178 8.spx	98.55894​
BNS308168 29.spx	96.88887​
BNS690 31.spx	96.53794​
BNS308168 30.spx	96.32752​
HORGMX_01 11.spx	96.22972​
HORGMX_01 12.spx	96.10689​
BNS690 32.spx	95.85589​
Cu_std_block_Rh_50kV_399_microAmp_05042022_1	93.48453​
GMX685 27.spx	93.33799​
GMX685 28.spx	93.05818​
GMX2139 25.spx	92.13512​
GMX2139 26.spx	91.96168​
GSC26110 24.spx	91.74521​
GSC26110 23.spx	91.35859​
stage_blank 7.spx	0.511236​
Mean value:	94.09108​
Std. Abw.:	17.00668​
Std. Abw. rel. [%]:	18.0747​
Conf. interval:	2.960483​

This is interesting information. It clearly shows that the copper percentage from one brand of bullet to the other can vary considerably. What we don't know are the other metals diluting the copper. These other metals can have a profound effect on the hardness and machinability of the copper, and thus affect petal behavior on impact.

 

[xsn10s]

This is interesting information. It clearly shows that the copper percentage from one brand of bullet to the other can vary considerably. What we don't know are the other metals diluting the copper. These other metals can have a profound effect on the hardness and machinability of the copper, and thus affect petal behavior on impact.

Another thing to factor in is the effects of possible annealing or work hardening of the copper during the manufacturing process. That can, and will affect terminal performance.

 

[nralifer]

This is interesting information. It clearly shows that the copper percentage from one brand of bullet to the other can vary considerably. What we don't know are the other metals diluting the copper. These other metals can have a profound effect on the hardness and machinability of the copper, and thus affect petal behavior on impact.

The composition of the BD2 tested is in line with what our supplier specified. We had iur copper stock tested by an independent metallurgy lab and got the same results.

 

[nralifer]

Another thing to factor in is the effects of possible annealing or work hardening of the copper during the manufacturing process. That can, and will affect terminal performance.

Forming copper does cause work hardening. We use full hard copper. Annealing would soften the copper and adversely affect bullet performance. Copper fouling of barrels would likely be bad.

 

[xsn10s]

When dealing with Dr Fackler my contention is much of his writings are taken out of context. For our purposes here as hunters some might look at his writings of not believing in a an "energy dump". Those beliefs were towards FMJ M16 and AK47 rounds when yaw wasn't present. He also discounted the degree of yaw both in external and terminal ballistics. His caveat was with barrels with proper twist rates. Well we know that twist rates will affect bullet stability with both external and some argued that it affects terminal ballistics. My belief is it will affect both. Dr Fackler also recognized that when fragmentation was present with M16 round the terminal trauma was

That screen shot was taken from his report "What's Wrong With Wound Ballistics Literature, And Why". (https://www.rkba.org/research/fackler/wrong.pdf". I'd argue that we use bullets that are designed to fragment to one degree or another thus creating more energy transfer or trauma. It's not apples to apples comparison.