DataTemplate of Grid inside ListView is not resizing - wpf

Question

I have a ListView that lays on top of UI graphics in my UserControl that I want to show and size using a Grid that matches the parent grid. I'm trying to template the way each item shown and sized using the ListView.ItemTemplate. The issue I'm having is that the DataTemplate is not sizing to the main Grid of the UI, and I'm not sure why.
This is what I've done, I think it a fairly simple and straight forward datatemplate:
<ListView ItemsSource="{Binding Path=StatusFilter}" Grid.Row="2" Grid.ColumnSpan="12">
<ListView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="92"/>
<ColumnDefinition Width="90"/>
<ColumnDefinition Width="85"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
<ColumnDefinition Width="90*"/>
</Grid.ColumnDefinitions>
<Label Content="{Binding Path=ECNNumber}" Grid.Column="0"/>
<Label Content="{Binding Path=DateECNDue}" Grid.Column="1"/>
<Label Content="{Binding Path=Model.Model}" Grid.Column="2"/>
<--More stuff for each column-->
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
When this is displayed the grid is completely bypassed and each element is shown like a horizontally aligned stackpanel. To test that my DataTemplate wasn't faulty I threw it into an ItemsControl and it worked perfectly. It resized with the parent grid without any issues.
Why isn't this working for the ListView, and how do I get it to work? I need the selection and scrollview capability of the ListView otherwise I'd be using the ItemsControl.
I read something about Grid.SharedSizeScope but that doesn't work with dynamic sizing of grid, and that's all I could really find on this issue.