Woocommerce Change default number of coloumns when adding products via shortcode

Hi everyone,
I want to change the coloumn number of shown products from 4 to 3. I already managed to do that on the shop page using this code:

add_filter('loop_shop_columns', 'loop_columns');

if (!function_exists('loop_columns')) {
function loop_columns() {
return 3; // 3 products per row
}
}

However if I use a shortcode like

[products ids="7297" ]
[product_category category="xyz"]

I still get 4 products per row. I know I can change this using

[products ids="7297" columns="3"]

but I don’t want to manually change that on every single shortcode I use (and there are quite a bit). Is there a way to change the default number of coloumns used for this shortcodes?

Thanx for your help!