7 LRM load data

[S-mac]

First of all, hi guys!

I just rechambered a Tikka T3x superlight in 7 LRM and need some help with some load data.

can anyone give me some data for RL 22, RL26 and or RL33 and 180gr ELDM.
Any help would be appreciated

 

[Dukerugger25]

Here is info on load work ups for my rebarrelled 7LRM. Original barrel which lasted about 1200 rounds liked the 180gr Berger Hybrid best. Load was 69.7g H1000 @ 2962fps - 3.413" OAL. Would hold <0.5MOA out to 1000yds, until it didn't.

Data posted in 2 sets: Ladder during first 150 rounds, Final OCW after barrel sped up ~70fps

New Barrel - Proof 1:8, 26"
Brass: GW, Bullet: 180gr Hornady ELD-M, Powder: H1000
OAL: 3.390" = 0.025" from lands

Charge (gr)	ELDM's
69.4	2966
69.6	2958
69.8	2960
70.0	2985
70.2	2972
70.4	2991

 

[Rick Richard]

My best 7LRM load

 

[Dukerugger25]

Barrel after 150 rounds*****
Brass: GW, Bullet: 180gr Hornady ELD-M, Powder: H1000
OAL: 3.390" = 0.025" from lands
6 shots @ each charge weight

Charge	Avg
69.6	2998
69.7	3009
69.8	3004
69.9	3018

Ladder with RL26******************************************************************************
***********************************************************************************************
Brass: GW, Bullet: 180gr Hornady ELD-M, Powder: RL26
OAL: 3.390" = 0.025" from lands
3 shots @ each charge weight

Charge (gr)	Round 1
65.4	2894
65.7	2917
66.0	2916
66.3	2924
66.6	2929
66.9	2959
67.2	2944
67.5	2959
67.8	2979
68.1	2988
68.4	3010
68.7	3012
69.0	3040

***********************************************************************************************
Landed on a load for the ELD-M's with H1000 @ 69.7gr, saving RL-26 for my PRC's.
Performed 2seating depth tests @ 200yds, averaged data below
***********************************************************************************************

OAL	RTO	Jump	Average	MOA
3.400	2.665	0.005	3005.667	1.5
3.390	2.655	0.015	3000	0.21
3.380	2.645	0.025	2995	0.4
3.370	2.635	0.035	2987	1.09
3.360	2.625	0.045	2990	0.75

I ended up settling on 3.385" OAL (0.020" jump) with the ELDM's, averaging 2997fps. Shot steel out to 1000yds last weekend - perfect!

 

[S-mac]

Thanks guys, really appreciate the help!

 

[cohunt]

make sure you check/compare your brass capacity--- IIRC the new lrm brass is different manu than the old hornady made lrm brass so capacity therefore max charge weight could be slightly different

 

[Dukerugger25]

Cohunt, I touched base with gunwerks last week and they said they had not received any of the new brass yet. It was still delayed. Have you heard otherwise?

 

[cohunt]

Nope, didnt realize it had been delayed-- still just hornady brass for now then

 

[Alberta Boy]

My best 7LRM load
View attachment 192004

I will second this load, works like a hot ****, if you like shooting bug holes that is.

 

[Allen Kitts]

My best 7LRM load
View attachment 192004

**** that is a sweet group.

 

[Alberta Boy]

I would say that the load was part of the equation, the fact that Dallas built the gun is the larger factor!