Henderson Trimmer - Order of operations

[longrange13]

Those with a Henderson timer, do you trim before or after sizing? Seems like before sizing could induce some run out, but after sizing leads to a really tight fit.

 

[Quant]

I size first, but then use a mandrel to set the neck tension to 0.002 or 0.003 depending on the cartridge. I also apply dry lube to the inside of the necks. Fit is snug, but not enough to induce runout or heat.

 

[SDHNTR]

Trim after sizing as sizing can change case length. I don’t understand why you think trimming makes for a “tight fit”.

 

[SloppyJ]

Sizing will impact the case length so trim after you size.

 

[longrange13]

Trim after sizing as sizing can change case length. I don’t understand why you think trimming makes for a “tight fit”.

Trimming after sizing makes it tight around the pilot. But I expanded with a mandrel and it worked fine.

 

[longrange13]

Sizing will impact the case length so trim after you size.

looks like in this case sizing added .002”

 

[longrange13]

I size first, but then use a mandrel to set the neck tension to 0.002 or 0.003 depending on the cartridge. I also apply dry lube to the inside of the necks. Fit is snug, but not enough to induce runout or heat.

Ended up doing this tonight, worked well

 

[SDHNTR]

Trimming after sizing makes it tight around the pilot. But I expanded with a mandrel and it worked fine.

Yes, trim after sizing and using the expander mandrel.

 

[ts94603]

trim after sizing