This worked for me, no splicing or anything required:
HTML
<div class="row" ng-repeat="row in rows() track by $index">
<div class="col-md-3" ng-repeat="item in items" ng-if="indexInRange($index,$parent.$index)"></div>
</div>
JavaScript
var columnsPerRow = 4;
$scope.rows = function() {
return new Array(columnsPerRow);
};
$scope.indexInRange = function(columnIndex,rowIndex) {
return columnIndex >= (rowIndex * columnsPerRow) && columnIndex < (rowIndex * columnsPerRow) + columnsPerRow;
};