This is right from their website makes me wonder about some other Remington items too.
WARNING! Remington Ammunition
Remington Ammunition is not recommended for use in Hastings Barrels. It has been reported that damage to the barrel can occur when customers used Remington Sabot Ammunition.
Hastings/Verney-Carron/KEBCO LLC will not be responsible for any damage incurred while using Remington sabot ammunition. Although the damage reported to date is to the barrel, this is no assurance that even more serious damage or injury could not occur. You are assuming all risks if you use Remington Sabot ammunition in Hastings barrels.