alaskan9974
Well-Known Member
- Joined
- Sep 21, 2016
- Messages
- 78
I have a 110LRH I bought in .338LM I bought just to get into the caliber. I am having a hard time with consistency, the rifle has a few hundred rounds through it.
I had a decent load I worked up this fall (40-50f temps) that would shoot 3/4 moa consistently out to 800. 300gr OTM hybrid bergers on top of 89.7 grains of retumbo inside of Lapua cases with Winchester Mag primers loaded at 3.7"
Took the rifle out this week shots were all over the place. Only major difference is the temp is now down to single digits. First day my best group at 100 yards was an amazingly accurate 1.6".
I figured I was to blame and worked up new loads today and shot off a rest shooting groups of 4. Same thing, one 2.3" group at 89.7gr and 1.4" at 89.3. 250gr SMK's with the same charges are noticeably tighter. Brought my 308 along and it had no trouble whatsoever bugholing groups.
I weigh each charge individually and typically have great results with SD/ES. I have checked everything on the rifle making sure all screws are tight. Does seating depth effect the hybrid bergers to this degree? I did shoot a group that my notes showed delivered moa groups, 91.5 retumbo with the OTM's at 3.681" but even that one measured at roughly 1.5". I posted a pic of one of my targets, you can guess which group are the sierra's.
My chrony is not picking anything up in our flat light, can anyone give me estimates for fps with the 250gr smk's over 89.7gr retumbo in lapua cases with a 26" barrel at 10f?
Does seating depth effect the hybrid bergers to this degree?
I had a decent load I worked up this fall (40-50f temps) that would shoot 3/4 moa consistently out to 800. 300gr OTM hybrid bergers on top of 89.7 grains of retumbo inside of Lapua cases with Winchester Mag primers loaded at 3.7"
Took the rifle out this week shots were all over the place. Only major difference is the temp is now down to single digits. First day my best group at 100 yards was an amazingly accurate 1.6".
I figured I was to blame and worked up new loads today and shot off a rest shooting groups of 4. Same thing, one 2.3" group at 89.7gr and 1.4" at 89.3. 250gr SMK's with the same charges are noticeably tighter. Brought my 308 along and it had no trouble whatsoever bugholing groups.
I weigh each charge individually and typically have great results with SD/ES. I have checked everything on the rifle making sure all screws are tight. Does seating depth effect the hybrid bergers to this degree? I did shoot a group that my notes showed delivered moa groups, 91.5 retumbo with the OTM's at 3.681" but even that one measured at roughly 1.5". I posted a pic of one of my targets, you can guess which group are the sierra's.
My chrony is not picking anything up in our flat light, can anyone give me estimates for fps with the 250gr smk's over 89.7gr retumbo in lapua cases with a 26" barrel at 10f?
Does seating depth effect the hybrid bergers to this degree?