Tim,
It depends on where you live. The shipping at Cabela's is $8.75, because they just use the dollar amount to charge on and distance doesn't have any bearing on the price. Add the $5.20 in tax and the dollar extra in cost and Caleba's is about $1 cheaper than Midway on the 405 gr bullets to my location.
However, let's use the example of a $173.49 purchase I made from Midway on 7/27/05. The shipping was $11.07 with no tax. At Cabela's the shipping would have been $12.75 plus $14.31 in tax for me. So, Cabela's would have cost $15 more for the same cost in merchandise.
Like I said, it depends on where you live and it also depends on the price per weight of what you buy.
BTW, that was 4 BSA 3-12X 50mm scopes and some .223" gas checks I bought for $173.49