Re: 6mm Grendel Improved (6mm ProCal)
Posted by Michael Bell on Apr 19, 2017; 6:03am
URL: http://oldforum.flyshooter.com.au/6mm-Grendel-Improved-6mm-ProCal-tp5709226p5709260.html
Well…..I'm very nearly to the point of calling this little cartridge a winner.
I've given 2208 a go and again had no issues running the mollied 103's up to 2970 fps & again accuracy seems to be best at about 2940 fps.
At this stage I would say that 2206H has the accuracy edge with tighter groups more often.
Below is an example of what I've been experiencing.
This a reduced copy of the Wagga 300 meter Fly target which I did on my computer. The 10 ring measures about 33mm.
This 5 shot group measures just under .7" with the first 4 coming in at about .3" I reckon this would be the 15 th time 3 or more shots have gone under the .6" mark & I think I've gone under the 1" mark for 5 shots 8 - 9 times. I should also say that usually the conditions have been quite calm because I'm normally out early morning & that all testing was done at 300 meters.
I can't say it's all beer & skittles though as this rifle seems quite sensitive to powder charge weight & seating depth. However when I get it right it shows extreme accuracy potential.
This barrel seems to like the 103's seated long into the lands & is also ok about 5 thou "out" but when seated in the "just in" zone groups can blow out to 1.5" - 2.0". I also think that .1 of a grain of powder can make a difference leaving me with quite small accuracy windows.
Conclusion: My test rifle weighs in at under 11.5 lbs so it's very light for a Fly rifle. Consequentially it has a bit of bite when shooting the 103's. When I say bite I don't mean Bull Mastiff style rather it's more like an angry Fox Terrier. It won't knock you off the stool but some effort to get technique right is required.
It's likely I could have gone for a stiffer, heavier barrel profile & still maintained rifle balance, which I believe in, but I was attempting to keep it legal for short range.
If I was a PPC shooter looking to get into "Fly" shooting I would definitely consider this case . I would probably like to get it up to at least 15 pounds (balanced) but I think that wouldn't be very difficult.
Regards,
Belly
URL: http://oldforum.flyshooter.com.au/6mm-Grendel-Improved-6mm-ProCal-tp5709226p5709260.html
Well…..I'm very nearly to the point of calling this little cartridge a winner.
I've given 2208 a go and again had no issues running the mollied 103's up to 2970 fps & again accuracy seems to be best at about 2940 fps.
At this stage I would say that 2206H has the accuracy edge with tighter groups more often.
Below is an example of what I've been experiencing.
This a reduced copy of the Wagga 300 meter Fly target which I did on my computer. The 10 ring measures about 33mm.
This 5 shot group measures just under .7" with the first 4 coming in at about .3" I reckon this would be the 15 th time 3 or more shots have gone under the .6" mark & I think I've gone under the 1" mark for 5 shots 8 - 9 times. I should also say that usually the conditions have been quite calm because I'm normally out early morning & that all testing was done at 300 meters.
I can't say it's all beer & skittles though as this rifle seems quite sensitive to powder charge weight & seating depth. However when I get it right it shows extreme accuracy potential.
This barrel seems to like the 103's seated long into the lands & is also ok about 5 thou "out" but when seated in the "just in" zone groups can blow out to 1.5" - 2.0". I also think that .1 of a grain of powder can make a difference leaving me with quite small accuracy windows.
Conclusion: My test rifle weighs in at under 11.5 lbs so it's very light for a Fly rifle. Consequentially it has a bit of bite when shooting the 103's. When I say bite I don't mean Bull Mastiff style rather it's more like an angry Fox Terrier. It won't knock you off the stool but some effort to get technique right is required.
It's likely I could have gone for a stiffer, heavier barrel profile & still maintained rifle balance, which I believe in, but I was attempting to keep it legal for short range.
If I was a PPC shooter looking to get into "Fly" shooting I would definitely consider this case . I would probably like to get it up to at least 15 pounds (balanced) but I think that wouldn't be very difficult.
Regards,
Belly
Michael Bell
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