diff --git a/icaruscode/TPC/Calorimetry/calorimetryICARUS.fcl b/icaruscode/TPC/Calorimetry/calorimetryICARUS.fcl
index 6ca52f145..d482bb16e 100644
--- a/icaruscode/TPC/Calorimetry/calorimetryICARUS.fcl
+++ b/icaruscode/TPC/Calorimetry/calorimetryICARUS.fcl
@@ -6,10 +6,11 @@ BEGIN_PROLOG
 icarus_calorimetryalgdata:	@local::standard_calorimetryalgdata
 icarus_calorimetryalgmc:	  @local::standard_calorimetryalgmc
 
-# Calorimetry constants from G. Putnam (Nov 2022)
-# Informed by MC calibration -- docdb 28639.
-# NOTE: needs to be revisted if/when the data processing is updated
-icarus_calorimetryalgmc.CalAreaConstants: [0.01343, 0.01338, 0.01219]
+# GP 8/4/25: with re-calibration and application of EMB recombination,
+# MC and data gains match. Note that we should not being making any
+# updates to the MC that would cause the MC gain to differ from that of
+# data.
+icarus_calorimetryalgmc.CalAreaConstants: @local::icarus_data_calconst
 icarus_calorimetryalgmc.ModBoxA: 0.904
 icarus_calorimetryalgmc.ModBoxBTF1: "[0]/TMath::Sqrt(TMath::Sin(x*TMath::Pi()/180)**2 + TMath::Cos(x*TMath::Pi()/180)**2/[1]**2)"
 icarus_calorimetryalgmc.ModBoxBParam: [0.204, 1.25]
diff --git a/icaruscode/TPC/Calorimetry/normtools_icarus.fcl b/icaruscode/TPC/Calorimetry/normtools_icarus.fcl
index 5443186cf..21a0f2de2 100644
--- a/icaruscode/TPC/Calorimetry/normtools_icarus.fcl
+++ b/icaruscode/TPC/Calorimetry/normtools_icarus.fcl
@@ -61,8 +61,8 @@ yznorm_sql: {
 #icarus_calonormtools: [@local::driftnorm, @local::yznorm, @local::tpcgain]
 icarus_calonormtools: [@local::driftnorm_sql, @local::yznorm_sql, @local::tpcgain_sql]
 
-# Gain with angular dep. recombination. Measurement from: https://arxiv.org/pdf/2407.12969
-# Assume equal on planes -- this is __wrong__ -- will need to be fixed when they are calibrated
-icarus_data_calconst: [0.0133333, 0.0133333, 0.0133333]
+# GP 8/4/25 -- Update gain to re-measurement with Run 2 stopping muons and 
+# fixed recombination.
+icarus_data_calconst: [0.016751, 0.012755, 0.012513]
 
 END_PROLOG
diff --git a/icaruscode/TPC/ICARUSWireCell/detsimmodules_wirecell_ICARUS.fcl b/icaruscode/TPC/ICARUSWireCell/detsimmodules_wirecell_ICARUS.fcl
index 5aa603e41..f01f766cc 100644
--- a/icaruscode/TPC/ICARUSWireCell/detsimmodules_wirecell_ICARUS.fcl
+++ b/icaruscode/TPC/ICARUSWireCell/detsimmodules_wirecell_ICARUS.fcl
@@ -54,9 +54,9 @@ icarus_simwire_wirecell:
 	    overlay_drifter: false # default drifter by default
 
             # Gain and shaping time
-            gain0: 17.9488  # mV/fC 
-            gain1: 12.4317 # mV/fC 
-            gain2: 14.0976 # mV/fC 
+            gain0: 18.0839  # mV/fC 
+            gain1: 12.2379 # mV/fC 
+            gain2: 13.8819 # mV/fC 
 
             shaping0: 1.3 # us
             shaping1: 1.45 # us