You obviously did not look at the $57.17 list price compared to the 06 at $39.31 when you typed the quote above.
I would never pay $57.17 Canadian for the 7mm heavy mag load,let alone in American funds.Wholesalesports.com which is a Canadian supplier sells the 30-06 165gr interbond light magnum load for $41.99 while the 7mmremmag heavy magnum interbond load costs $50.99 both in Canadian funds.That amounts to $9 Canadian difference rather than your $18 American difference.Russells Sports,another Canadian supplier,lists the two SST loads for a difference of $7.
Midwayusa lists the 30-06 light magnum 165gr loads at $30.49 and 34.99 for the sst and interbond loads,while the 7mm heavy magnum loads are listed at $36.49 and $41.99 for the same sst and interbond bullets.That amounts to a difference of $6 for the sst loads and $7 for the interbond loads.
Ables lists the two 30-06 165gr light magnum loads at $31.80 and $36.38 for the ssst and interbond,while the 7mm heavy magnum loads are listed at $38.78 and $44.21 for the sst and interbond loads.The differences amount to Less than $7 for the sst and less than $8 for the interbond loads.
Obviously your shopping skills are lacking.
When you run the Federal 80 grain softpoint which is designed for deerit is .1 flatter at 250 yards for less than half the money.
I choose not to use the standard cup and core 80gr soft points for our Canadian bucks which often exceed 300lbs live weight.Using bullets suitable for large bodied deer,the 7mmremmag does shoot flatter.