JACKETED BULLET TEST-SOME CONCLUSIONS

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  • Last Post 06 August 2018
joeb33050 posted this 05 August 2018

 

 JACKETED BULLET TEST-SOME CONCLUSIONS

 

I used one lot each of 223 and 22-250 brass. All were neck-chamfered and trimmed to length. The 22-250 cases were neck-turned in the distant past.

 

The primary question prompting the test is: “With everything else the same, at cast bullet velocities, with a cast bullet powder; do jacketed bullets shoot more accurately than cast bullets?”

 

The answer is clearly “Yes”.

 

The next question is: “What causes the accuracy difference”; and the answer is: ‘The bullet.”

 

Jacketed bullets shoot more accurately than cast bullets because of differences in the bullets. The accuracy difference is NOT about concentricity or orientation or powder weight variation or neck thickness or the shooter or the bench rest equipment or neck tension or alloy hardness/pressure or lube or primer pocket uniformity or flash hole uniforming or flash hole chamfering or shooting bullets in the order they’re cast or any of the other oft-touted causes/solutions.

 

It’s the bullets.

 

“What jacketed bullet characteristics make them more accurate?”. I don’t know.

 

“How can we change cast bullets to make them more accurate?”. I don’t know but can suggest that powder coating or changing shape or changing hardness or zinc bullets might be the/an answer.

 

“If we do enough fiddling with concentricity or orientation or powder weight variation or neck thickness or the shooter or the bench rest equipment or neck tension or alloy hardness/pressure or lube or primer pocket uniformity or flash hole uniforming or flash hole chamfering or shooting bullets in the order they’re cast or any of the other oft-touted causes/solutions; will cast bullets shoot as accurately as jacketed?”.

 

I don’t KNOW, but decades of testing suggests that the answer is NO.

 

Next?

 

I’m going to start THE BS LIST, a list of CB techniques/myths that do not improve accuracy, in my opinion. Disagree with DATA, prove me wrong, but give me no opinions-I’ve got plenty.

 

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RicinYakima posted this 05 August 2018

"will cast bullets shoot as accurately as jacketed?” I don’t KNOW, but decades of testing suggests that the answer is NO."

I agree, your data, and empirical experience tells me that it is a true statement.

“How can we change cast bullets to make them more accurate?”. I don’t know but can suggest that powder coating or changing shape or changing hardness or zinc bullets might be the/an answer.

I don't' know either. Standing by and awaiting results from the intrepid explorers.

Your BS list is only relevant with cast bullet compared to cast bullet, and a lot of those are BS even then.

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45 2.1 posted this 05 August 2018

I see a list and verbiage with a lot of BS in it. The major problem with lists like that is data collection without the collector being able to shoot well enough to know what is true and what isn't all depending on the circumstances involved. Until you can shoot well enough (that would be a lot better than what I've seen so far), a lot of those things on that list remain a mystery to them with a lot of assumptions made, true and untrue.

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joeb33050 posted this 05 August 2018

I see a list and verbiage with a lot of BS in it. The major problem with lists like that is data collection without the collector being able to shoot well enough to know what is true and what isn't all depending on the circumstances involved. Until you can shoot well enough (that would be a lot better than what I've seen so far), a lot of those things on that list remain a mystery to them with a lot of assumptions made, true and untrue.

Opinion/s, got plenty, don't need any more, especially from you. Print 'em up and run 'em up the old back passage. 

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frnkeore posted this 05 August 2018

"I’m going to start THE BS LIST, a list of CB techniques/myths that do not improve accuracy, in my opinion. Disagree with DATA, prove me wrong, but give me no opinions-I’ve got plenty."

So, only YOUR opinion matters or means anything?

Frank

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joeb33050 posted this 05 August 2018

"I’m going to start THE BS LIST, a list of CB techniques/myths that do not improve accuracy, in my opinion. Disagree with DATA, prove me wrong, but give me no opinions-I’ve got plenty."

So, only YOUR opinion matters or means anything?

Frank

Data trumps opinion, every time. Got any? 

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John Alexander posted this 06 August 2018

This thread shows signs of getting out of bounds.  State your arguments, show your data, and please hold the insults and personal remarks.

It may help to make it clear what classes of firearm we are talking about. 

If the topic is worth discussing it is worth discussing in a civil manner.

Thanks for your cooperation.

John

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Larry Gibson posted this 06 August 2018

“What jacketed bullet characteristics make them more accurate?”.

Jacketed bullets can be made more uniform with much better balance.  There are several factors in the casting of bullets that cause imbalances we can't control.....such as shrinkage within the mould.  The swaging of jacketed bullets do not have the degree of imbalance potential that casting does. 

As to "data" I have posted numerous threads/posts regarding this. Additionally your own data demonstrates this.  The better the quality/balance of any bullet the more potentially accurate is.  Cast bullets just have more limiting factors in making a perfectly balanced bullet than do jacketed bullets.

LMG

Concealment is not cover.........

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Dukem posted this 06 August 2018

I sure hope the kind of nasty, personal, posts I got sick of seeing on another forum don't become pervasive on CBA. If I want to see that kind of BS I'll just go back to watching the nightly news.

Duke

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