Sub gauge shotgun inserts and pressure

jaegermister

March 06, 2014 14:10

Question, concerning sub gauge chamber inserts (not full length) such as 16 ga fired in 12 ga, 20 ga fired in 16 ga chamber. Is the pressure reduced due to the larger bore firing a sub gauge ? If a 16 ga is chambered for 2 1/2 and a sub gauge 20 2 3/4 is fired is the pressure less due to the over bore size with a smaller wad of the sub gauge.? Is the shot velocity less?

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  Mobuck

  March 06, 2014 14:37

  Lots of gas goes past the wad.

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  golferboy426

  March 07, 2014 10:31

  I have a 20 o/u in which I use savage 410'ers for skeet. I have not noticed any difference in lead or target breaking ability. I can regularly break 22-23 and sometimes 25

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  wpage

  March 09, 2014 11:54

  Probably loose some range & velocity due to pressure loss.

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  gruntled

  March 10, 2014 00:12

  quote:Originally posted by golferboy426
  I have a 20 o/u in which I use savage 410'ers for skeet. I have not noticed any difference in lead or target breaking ability. I can regularly break 22-23 and sometimes 25
  
  
  They made sense when .410s were far cheaper than 20s or 12s. That was LONG ago. .410s are too expensive now. I can't even reload them anymore since I wore out all the paper shells I had. I tried the
  #@&&!) plastic shells & I can't get the crimp to hold.

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