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<blockquote data-quote="swampratt" data-source="post: 2792594" data-attributes="member: 15054">I could see having issues that you are talking about when it comes to virgin brass or SS tumbled brass where there is virtually no lubricity to the inside of the neck. That is one reason I quit SS tumbling,I believe it too, While doing a brass fail test and only hand cleaning cases i noticed my groups were very tight.. tighter than my Pin cleaned cases.Sad thing to say,, I mostly hand clean now.Do you have an IR temp gun?I noticed with my savage 10fp when i got the barrel to a certain temperature slot the groups got tighter.I was not using a chrony at that time.Like you said &quot;extremely interesting results&quot; will happen especially&nbsp; if you shoot enough.Heat and barrel fouling have a big role to play in accuracy and your tests help sift through some of this information, keep it up as it&#039;s good information to read.</blockquote>

[QUOTE="swampratt, post: 2792594, member: 15054"] I could see having issues that you are talking about when it comes to virgin brass or SS tumbled brass where there is virtually no lubricity to the inside of the neck. That is one reason I quit SS tumbling, I believe it too, While doing a brass fail test and only hand cleaning cases i noticed my groups were very tight.. tighter than my Pin cleaned cases. Sad thing to say,, I mostly hand clean now. Do you have an IR temp gun? I noticed with my savage 10fp when i got the barrel to a certain temperature slot the groups got tighter. I was not using a chrony at that time. Like you said "extremely interesting results" will happen especially if you shoot enough. Heat and barrel fouling have a big role to play in accuracy and your tests help sift through some of this information, keep it up as it's good information to read. [/QUOTE]

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