Yes, you could do that at the expense of recoil but no full size 9mm is going to be anywhere near as lightweight as the 57 which was one of the OP's main requirements.
My Canik TP9DA with a 20rd magazine weights 25 oz. 0.5 oz more than the Ruger 57. However, as you said the recoil would be a lot more than the 5.7x28 round.
I was thinking the kinda along the same lines but now I'm wondering what the right difference is between 20 rounds of 9mm vs the same amount of 5.7x28. there will be some variance depending on bullet weight but I'm sure even the lightest defensive 9 weighs more than the heaviest 5.7
My Canik TP9DA with a 20rd magazine weights 25 oz. 0.5 oz more than the Ruger 57. However, as you said the recoil would be a lot more than the 5.7x28 round.
My Canik TP9DA with a 20rd magazine weights 25 oz. 0.5 oz more than the Ruger 57. However, as you said the recoil would be a lot more than the 5.7x28 round.
I was thinking the kinda along the same lines but now I'm wondering what the right difference is between 20 rounds of 9mm vs the same amount of 5.7x28. there will be some variance depending on bullet weight but I'm sure even the lightest defensive 9 weighs more than the heaviest 5.7
My Canik TP9DA with a 20rd magazine weights 25 oz. 0.5 oz more than the Ruger 57. However, as you said the recoil would be a lot more than the 5.7x28 round.
Have you weighed a 20 round mag of 9 with 65 GR bullets on board? Have you fired a 9mm with 65 grain bullets and signifigant reduction in recoil? I can tell you a mag of 65 GR bullets is appreciably lighter as is the recoil with 65 GR bullets. Recoil is a simple product of action VS reaction. Obviously a 30 grain bullet recoils less than a 65 grain bullet just as a 65 grain bullet recoils less than a 124 GR bullet. There's a lot of variables involved but considering the size difference between a Glock 19 VS either of the 5.7 pistols I don't understand the fascination with the 5.7. I will happily embrace the moniker of dinosaur and be sticking with what I know works, the 9MM.
[FONT=&]NRA Life Member / [/FONT]Basic Pistol instructor[FONT=&] / RSO[/FONT][FONT=&]
[/FONT][FONT=&]"Under pressure, you don't rise to the occasion, you sink to the level of your training. That's why we train so hard" [/FONT][FONT=&]
[/FONT][FONT=&]Unnamed Navy Seal[/FONT][FONT=&]
[/FONT][FONT=&]“Ego is the reason many men do not shoot competition. They don't want to suck in public” ….Coach[/FONT]
So, bullet choice is an extremely important subject when we're talking about 5.7x28. I'm not as well versed as I could be, but I know enough and have experimented enough to feel completely comfortable carrying a 5.7 over 9mm. That being said, your 27-28gr lead free hollow points in the basic SS195 or SS198 (they are for all intents and purposes the same except one says LE ONLY and that's only a manufacturer recommendation) have produced wound results similar to 45acp +p in meat targets. All that in mind, Speer is producing a gold dot hollow point and that should be pretty reasonable for later this year after some testing has been done. There are a couple of really good testers on youtube and the 5.7 forums you can google for additional info. Most commercial 5.7x28 isn't loaded to be as hot as it can be by any stretch and you must remember that reloading it isn't difficult, just more precise that hucking 5 grains +or- .5 grain into a 45 acp case. It is more expensive when you calculate dies etc, but that should be coming a little closer to reasonable with the ruger 57 coming out and more pcc in 5.7. Also worth mentioning, you need to take special care when cleaning the brass. There's a method that isn't expensive and cleans them perfectly fine for reloading that saves the lacquer on the brass so you get greater case life. There are specialty ammo manufacturers that load full power 5.7x28 and really get the potential of the round, but it's expensive boutique ammo and is close to $2 or more a round in certain places if you can find it. it's definitely stronger than 9mm imo despite lacking the strength on paper. 45-70 looks abysmally slow on paper, but I'm sure everyone here is aware of it's destructive potential.