diff --git a/src/proto_nd_flow/reco/charge/calib_prompt_hits.py b/src/proto_nd_flow/reco/charge/calib_prompt_hits.py
index 6afa7afd..eead47e5 100644
--- a/src/proto_nd_flow/reco/charge/calib_prompt_hits.py
+++ b/src/proto_nd_flow/reco/charge/calib_prompt_hits.py
@@ -219,7 +219,8 @@ def run(self, source_name, source_slice, cache):
             calib_hits_arr['io_group'] = packets_arr['io_group']
             calib_hits_arr['io_channel'] = packets_arr['io_channel']
             calib_hits_arr['Q'] = self.charge_from_dataword(packets_arr['dataword'],vref,vcm,ped)
-            calib_hits_arr['E'] = self.charge_from_dataword(packets_arr['dataword'],vref,vcm,ped) * 23.6e-3 # hardcoding W_ion and not accounting for finite electron lifetime
+            #!!! hardcoding W_ion, R=0.7, and not accounting for finite electron lifetime
+            calib_hits_arr['E'] = self.charge_from_dataword(packets_arr['dataword'],vref,vcm,ped) * 23.6e-3 * 0.7
 
             # create truth-level backtracking dataset
             if has_mc_truth: