Greetings folks,
I just recently began experimenting with different holds while training for precision rifle competitions. I am relatively new to precision rifle and am shooting RDF 105s out of a 6x47 Lapua in an MPA chassis. I noticed a significant change, both in velocity and group size, when going from a very light hold (almost free recoil with very light shoulder, cheek, and trigger hand contact) to a strong hold with cheek weld. I ran a new ladder test which revealed MV had increased slightly and my accuracy node had shifted from 39.6 gn of H-4350 to 38.8 gn. Atmospheric conditions have been stable and consistent in the morning where I shoot in southern NM and I am confident in the consistency of my reloading process (powder charge within .06 gn, shoulder bump .002, seating depth within .002, runout at ogive equal or less than .002). My questions are as follows:
1) Is this a reasonable change caused by the hold changing harmonics?
2) For you experienced tactical match shooters, what hold is going to lend itself better to positional match shooting or is it completely preference?
3) Do harmonics change from position to position during a match? How do you manage these changes?
-My rifle is currently averaging .42 moa from prone (roughly same with both holds). I lean toward the light hold because it helps eliminate the heart beat.
Any insight would be appreciated! Thanks in advance!
James
rifle-
Rem 700 trued
6x47 Lapua
Brux m24, 7.5 twist, 272 nk, .1 freebore
MPA BA chassis
Loads-
RDF 105, cci 450, 39.6 gn H-4350 at 3.062 (.02 jump), 3130 MV with light hold
RDF 105, cci 450, 38.8 gn H-4350 at 3.062 (.02 jump), 3087 MV with hard hold
I just recently began experimenting with different holds while training for precision rifle competitions. I am relatively new to precision rifle and am shooting RDF 105s out of a 6x47 Lapua in an MPA chassis. I noticed a significant change, both in velocity and group size, when going from a very light hold (almost free recoil with very light shoulder, cheek, and trigger hand contact) to a strong hold with cheek weld. I ran a new ladder test which revealed MV had increased slightly and my accuracy node had shifted from 39.6 gn of H-4350 to 38.8 gn. Atmospheric conditions have been stable and consistent in the morning where I shoot in southern NM and I am confident in the consistency of my reloading process (powder charge within .06 gn, shoulder bump .002, seating depth within .002, runout at ogive equal or less than .002). My questions are as follows:
1) Is this a reasonable change caused by the hold changing harmonics?
2) For you experienced tactical match shooters, what hold is going to lend itself better to positional match shooting or is it completely preference?
3) Do harmonics change from position to position during a match? How do you manage these changes?
-My rifle is currently averaging .42 moa from prone (roughly same with both holds). I lean toward the light hold because it helps eliminate the heart beat.
Any insight would be appreciated! Thanks in advance!
James
rifle-
Rem 700 trued
6x47 Lapua
Brux m24, 7.5 twist, 272 nk, .1 freebore
MPA BA chassis
Loads-
RDF 105, cci 450, 39.6 gn H-4350 at 3.062 (.02 jump), 3130 MV with light hold
RDF 105, cci 450, 38.8 gn H-4350 at 3.062 (.02 jump), 3087 MV with hard hold
