Been shooting the MG-115's for about a year in my stock Grandmaster. Find them flatter and slightly
more accurate than the MG-124's I was using(1.5 vs 2.0 inches @ 25 yds). PF=170 with the following load :
8.7 gr True Blue
1.170 OAL
Range brass
Fed SPP
I also believe the increased slide velocity(in recoil) has cured my 1/100 failure to eject problem.
( I am running a 7 lb recoil/15 lb main springs in a 12.6 oz. slide )
Ray
I'm running 115 gr MG JHP at 1.167OAL over 8.7 gr of True Blue.
Expect to chrono at 1550 FPS extrapolating from 8.1gr /115 ( 1426 actual) and 124 gr data.
Have been shooting this for 2 months now. Comp likes extra gas and load runs cleaner than before.
Will give you some rounds to test if you want.
Ray
As I remember my statistics ....
+ or - 1 SD = 67%
+ or - 2 SD = 95%
+ or - 3 SD = 99.5%
So in order to be 99.5% sure you pass the chrono stage you need a median fps of 1056 (1008 + 3 x the SD of 16).
Bump up the charge for the FL Open and try to lower your SD in the future. Although, I agree 16 ain't bad.
Ray
Parralax....
Make sure you have the powder hopper on the right way.....with the hopper opening directly over
the charge bar opening. I have the same setup and its always right on.
Ray
Had the same trouble with my Grandmaster. Went to Aftec and sideways mount( Cheely or Quinn 2 ). Problem gone.
Clean the Extractor tunnel and Aftec frequently, certainly before every match.
Ray
Tactical Solutions barrel will produce 3/4 " groups at 25 yds from a Ransom Rest.
Using relatively cheap ammo (CCI) and its a bolt on , no FFL part.
Have test data to prove it.
Ray
I know several folks that run the Ultradot Pan AV (~$240) on Rugers for steel. You have a choice of reticles
and the frame that holds the glass is very thin, that allows good visibility on 3 sides.
Ray
Oak Hill Enterprises (www.oakhillenterprises.com) is offering subject gun (this AM) for $2,299.00 vs normally advertised price of $3,299 and
MSRP of $3,650.00. I have one already or I would pursue myself.
Ray
I have not been able to get the OAL variation below +/-.005" on my Lee Loadmaster. I have a Redding
Competition seating die and have added "C" clamps to the toolhead to prevent verticle movement.
Even when I segregate the ammo produced from each shellplate hole I still get variations of +/- .004".
Although this drives me bats, I calculate a difference of .010" OAL only makes a ~1.3% difference in case volume.
So, forgeddabouit ...
Ray
I'm using the MG 124 JHP's over 8.0 gr of True Blue at 1.170 OAL with Fed SPP. Gives me a chrono of 1380-1400 FPS out of my TruBore Grandmaster.
I have tested Sil but found it dirtier. Also found that the JHP's grouped much tighter (2 vs 4" @ 25 yds)than MG's 124 CMJ's.
True Blue is clean and meters very well and I'm sticking with it.