What does everyone think is a good Self defense ammo? Has anyone used Winchester 147 G Hollow points??
It costs money, but try it and make sure it will cycle reliably in your gun...
6shooter covered the 1st question just fine.
I've owned over a dozen pistols in 9mm over the years (including 4 different Hi Powers alone) and no 2 have ever liked the same exact JHP round. Now, I've had some that worked well with the same load but I've never had 2 that had the same 'best' load.
A carry load HAS to be 100% reliable. No FTF's, FTE's, ... AND it needs to be reasonably accurate (1 holes aren't necessary but all shots in the bottom of a Coke Can if you do your part is a reasonable goal).
As for the 147gr 9mm load, I'd avoid it.
The theory is sound on paper- kinda- but in the real world, it isn't practical. With that heavy a bullet weight, you are lucky to get 1000fps (hence the 'subsonic' part. The speed of sound is 1140fps at sea level). Most JHP bullets need a velocity of 900-1000 fps AT LEAST to operate as designed. You are already on the edge of that with the
published velocities and they can't be trusted.
In the ammunition world, the numbers listed on the box are from test labs using test barrels of unknown (or at least rarely published) barrel length. Longer the barrel, higher the velocity because there's more time for the powder to burn and expand while pushing the bullet. Longer the expansion, the faster the bullet goes until all the powder is burned and friction with the barrel sets in which slows the bullet or the bullet leaves the barrel and the rest of the powder is burned as flash.
If they used, as an example, a 6 inch test barrel and got 1,000fps and you are shooting a 4.5 inch barrel, you are NOT going to get 1,000fps. You may get 900 or you may just get 800. (1 inch of barrel length normally means 50 to 150fps of velocity depending on burn characteristics of the propellant used). It really varies from gun to gun- even if the guns are identical in every way except serial number. The only real way to see is to shoot ammunition in YOUR gun over a chronograph and see what's really happening. For the sake of saving you a range trip and a chrony session, I'd just go to a lighter bullet weight. In my experience, 9mm's seem to perform extremely well with the 124-5 to 130gr bullet weights both in velocity and accuracy.