Michael, this is a chart from New England rope showing the breaking strength of 3 strand nylon line. If you are not going with a all chain rode, check to see the breaking strength of the size of line you are planing to use. I never have seen a good reason to use chain that has a 12,000lbs breaking strength with line that breaks at 7,500.

<TABLE cellSpacing=0 cellPadding=4 border=1><TBODY><TR><TH align=middle rowSpan=2>Size</TH><TH align=middle colSpan=2>Weight</TH><TH align=middle colSpan=2>Tensile</TH></TR><TR><TH align=middle>lbs/100'</TH><TH align=middle>g/m</TH><TH align=middle>lbs</TH><TH align=middle>kg</TH></TR><TR><TD align=right>3/16"</TD><TD align=right>1.0</TD><TD align=right>14.9</TD><TD align=right>1,200</TD><TD align=right>545</TD></TR><TR><TD align=right>1/4"</TD><TD align=right>1.5</TD><TD align=right>22.3</TD><TD align=right>2,000</TD><TD align=right>908</TD></TR><TR><TD align=right>5/16"</TD><TD align=right>2.5</TD><TD align=right>37.2</TD><TD align=right>3,000</TD><TD align=right>1,362</TD></TR><TR><TD align=right>3/8"</TD><TD align=right>3.5</TD><TD align=right>52.1</TD><TD align=right>4,400</TD><TD align=right>1,998</TD></TR><TR><TD align=right>7/16"</TD><TD align=right>5.0</TD><TD align=right>74.4</TD><TD align=right>5,900</TD><TD align=right>2,679</TD></TR><TR><TD align=right>1/2"</TD><TD align=right>6.5</TD><TD align=right>96.7</TD><TD align=right>7,500</TD><TD align=right>3,405</TD></TR><TR><TD align=right>9/16"</TD><TD align=right>8.2</TD><TD align=right>122.0</TD><TD align=right>9,400</TD><TD align=right>4,268</TD></TR><TR><TD align=right>5/8"</TD><TD align=right>10.0</TD><TD align=right>148.8</TD><TD align=right>12,200</TD><TD align=right>5,539</TD></TR><TR><TD align=right>3/4"</TD><TD align=right>13.6</TD><TD align=right>202.4</TD><TD align=right>16,700</TD><TD align=right>7,582</TD></TR><TR><TD align=right>7/8"</TD><TD align=right>18.7</TD><TD align=right>278.3</TD><TD align=right>23,500</TD><TD align=right>10,669</TD></TR><TR><TD align=right>1"</TD><TD align=right>26.4</TD><TD align=right>392.8</TD><TD align=right>29,400</TD><TD align=right>13,348</TD></TR><TR><TD align=right>1-1/8"</TD><TD align=right>30.6</TD><TD align=right>455.3</TD><TD align=right>34,000</TD><TD align=right>15,436</TD></TR></TBODY></TABLE>