OK ,
It depends on the can & calibre , but as an example , using a Sako TRG-42 rifle in 338LM , with a all steel Reflex T8M suppressor , and a 16x scope , I could only 3rds before I had heat mirage off the can so bad , as I could not see the target , due to the seroius amount of heat produced by 3 shots .
The cover acts as a barrier/shield as far as heat simmer directly off the can .
So it enables you to shoot more rds than a un-shielded can , it does however not allow the can to cool as quickly as un-wrapped .
The TAB covers are ONLY rated for bolt guns or semi-autos , and NOT full auto etc .
So a lesser cal , burning less powder wil heat a can up slower than the extreme example of the 338LM .
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