SG is one of the best dealers listed on this website. Their 3 month $9.99 club membership that gives you free shipping on orders over $49 is cheaper than shipping, so I always sign up for that right before I purchase the item, then turn off auto renewal. Just note, you have to buy the membership first, it won't apply to your first order if it's in the same cart. Once you buy the membership and log back in the free shipping applies immediately.
I would recommend this retailer to a friend.
I have bought at least ten times from them in the past year. My only complaint is that they deleted (several times) my somewhat negative review of one of the ammo purchases that had hard primers for my revolver. I did not bag on them at all in that review but rather just warned of that particular ammo in my revolver. Overall their prices are good, their packaging is solid (two layers) and they ship pretty fast. I am a regular ammo customer.