Gemsbok405
02-09-2016, 03:46 AM
Been putting a lot of effort into loads for above pistol, and have several loads with 124/125gr SWC/CN/RNFP at around the 1050 fps mark, and all are shooting about 2" or so lower than POA at 7m. Grouping is tight...
The question looking at, is the sights set-up on the MK11. Rear sight is 0.100"above rib, front sight is 0.125" above rib. Add 0.050 for height above top of slide for both.
As can be seen the sighting plane (POA), with relatively lower rear sight, is rising above barrel axis, and worsens the longer the range. The rear sight is 0.025"lower than the front sight...
From what can see with the Colt 1911, the average sight heights are about 0.240" at rear and 0.200" at front, the opposite of the BHP mk11. This allows for the sighting plane to meet the barrel axis and the POI to rise above the POA as distance increases.
Many years ago had a BHP T-series with fixed sights, and had to file down the front sight to get POA=POI with the RCBS 124cn cast bullet.
I would rather not mess with mk11 front sight as is machined as part of rib and very solid!
Anyone with thought or experience with BHP mk11 would be welcome!
The question looking at, is the sights set-up on the MK11. Rear sight is 0.100"above rib, front sight is 0.125" above rib. Add 0.050 for height above top of slide for both.
As can be seen the sighting plane (POA), with relatively lower rear sight, is rising above barrel axis, and worsens the longer the range. The rear sight is 0.025"lower than the front sight...
From what can see with the Colt 1911, the average sight heights are about 0.240" at rear and 0.200" at front, the opposite of the BHP mk11. This allows for the sighting plane to meet the barrel axis and the POI to rise above the POA as distance increases.
Many years ago had a BHP T-series with fixed sights, and had to file down the front sight to get POA=POI with the RCBS 124cn cast bullet.
I would rather not mess with mk11 front sight as is machined as part of rib and very solid!
Anyone with thought or experience with BHP mk11 would be welcome!