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Rifles, Reloading, Optics, Equipment
Reloading
crushing case necks when using expander mandrel to open case neck on a 338SS
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<blockquote data-quote="Tidesloe" data-source="post: 2874878" data-attributes="member: 47761"><p>I ran into this with ADG brass from Rich earlier this week. When expanding 300 SS headstamped brass from 284 to 308. I have a Sinclair expander die and SS mandrels that need replacing. Can't seem to find carbide mandrels anywhere so I bought a full 30 cal mandrel set from 21st century innovations to try. It includes 9 mandrels from .304 to .309. I began with the smallest in the set at .304, and crushed 1 of my first 2 with Imperial dry neck lube. I then switched to Imperial sizing wax which made the sizing easier, but still crushed another one of my next 4 or 5. I had also bought from 21st century a 7mm to 30 cal neck up mandrel which has a much longer taper and with sizing wax had no more crush on me. I also have necked up 7mm to 338 SS in the past with no issues. I've never crushed necks before this week, but the only way I was able to get through a box of 300ss necked up from 284 was with a 7mm to 30 cal neck up mandrel with sizing wax. I wouldn't even try this mandrel with dry neck lube. This batch of brass is way too soft. That's the only conclusion I can come to on it</p></blockquote><p></p>
[QUOTE="Tidesloe, post: 2874878, member: 47761"] I ran into this with ADG brass from Rich earlier this week. When expanding 300 SS headstamped brass from 284 to 308. I have a Sinclair expander die and SS mandrels that need replacing. Can’t seem to find carbide mandrels anywhere so I bought a full 30 cal mandrel set from 21st century innovations to try. It includes 9 mandrels from .304 to .309. I began with the smallest in the set at .304, and crushed 1 of my first 2 with Imperial dry neck lube. I then switched to Imperial sizing wax which made the sizing easier, but still crushed another one of my next 4 or 5. I had also bought from 21st century a 7mm to 30 cal neck up mandrel which has a much longer taper and with sizing wax had no more crush on me. I also have necked up 7mm to 338 SS in the past with no issues. I’ve never crushed necks before this week, but the only way I was able to get through a box of 300ss necked up from 284 was with a 7mm to 30 cal neck up mandrel with sizing wax. I wouldn’t even try this mandrel with dry neck lube. This batch of brass is way too soft. That’s the only conclusion I can come to on it [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
crushing case necks when using expander mandrel to open case neck on a 338SS
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