ASSRA Forum - Lesson learned fixed vs breech and bullet diameter

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Lesson learned fixed vs breech and bullet diameter (Read 1947 times)

Dellet Frequent Elocutionist Offline Posts: 1092 Joined: May 19^th, 2017	Re: Lesson learned fixed vs breech and bullet diameter Reply #15 - Jun 11^th, 2022 at 3:37pm	Print Post
	Remember that the actual question was not “how to stop leading in the barrel”. The question was why does the same likely “too small diameter bullet not lead the barrel when shot as a fixed cartridge” Seating the bullet with the base just barely touching the lands, and/or using softer lead has solved that problem for me when using bullets “too small”. Sometimes as much as .001” under groove diameter.


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Lesson learned fixed vs breech and bullet diameter Reply #16 - Jun 11^th, 2022 at 3:45pm	Print Post
	I thought the gentleman was looking for a way to use this same bullet for successful breech seating use and I do apologize if I mistakingly got that wrong.

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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Marlene Senior Forum Member Offline Posts: 272 Joined: Oct 30^th, 2015	Re: Lesson learned fixed vs breech and bullet diameter Reply #17 - Jun 11^th, 2022 at 4:51pm	Print Post
	I would make a moderately wild guess that the smaller bullet from the fixed cartridge is already bumping up to throat/groove size as it is leaving the case, so that gas cutting is sealed off before gasses are escaping from the case.


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Cbashooter Frequent Elocutionist Offline Posts: 1573 Location: Eastern Wa. Joined: Mar 31^st, 2018	Re: Lesson learned fixed vs breech and bullet diameter Reply #18 - Jun 12^th, 2022 at 12:17am	Print Post
	Dellet wrote on Jun 11^th, 2022 at 2:19pm: Try seating the 258 bullet shorter, less into the chamber. What’s likely happening is the base of the fixed ammo is bumping up in the throat to say 259-260 then sizing back down before it enters the grooves. Seating the bullet shallower will allow that to happen, the base will be in a larger diameter portion of the taper. It may not be accurate, but will answer the question of what is happening if the leading stops. Just sizing a bullet to 259 may stop the leading, but won’t really answer why the fixed load does not lead, but the seated load does. Thanks for understanding what I was posting.


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