Help with M1 Carbine reloading!

I have been reloading on a regular basis since I started on my kitchen table in an apartment around 1976 and usually have no problems. But I do now!
I bought a new M1 Carbine. I bought 400 rounds of PPU JSP. Fitst 30 rounds I had a few failure to go into battery etc but to be expected with a new semi auto. After that it settled down and no more issues of any kind.
I wasn't going to reload but ended up with so much brass from mine and a friend gave me a bunch too,
I cleaned,deprimed, full length resized, cleaned primer pocket. Trimmed to 1.286. Lightly flared case mouth and loaded some 90 grain Hornady JHP. Internet reloaders said to load to 1.550.
I had problems with them not firing. I used CCI small rifle primers and then switched to Winchester. I had to lengthen the cartridge to 1.609 to get it to feed and cycle but most are not firing and looks like a pretty decent primer hit.
Last night I pulled three bullets and all the primered cases fired!
I kinow the bolt is fully home. I know the M1 carbine headspaces on the case mouth. That is about all I know.
I tried crimp and no crimp and it made no difference.
I am at a loss at what to look for next!
Thanks!

H110

I will take your advise and try another powder and primer!. The 110 fills the case up pretty full though!

Reflecting back on my first response, I chose H110 as it was a very recommended powder for the carbine.
I was using 15.5grns with a 90gr bullet which is in the manuals.
I use the Lee Hand primer and seat the primers with a good firm push. I am not as concerned with the feeding as in the just not firing. I expected possible feeding issues with a hollow point but wanted to try it on pigs.
Even with a weak or poor primer choice the primer should go off.
Today I took the rifle apart. The hit on the firing pin looks good and centered. I cleaned the bolt and also made sure the chamber was clean.
I previously tried some CCI#41 primers which are magnum but also harder to set off. When I had problems with them I tried WSR primers with about the same results.
I am not sure if I tried to refire any of the once struck rounds but will next range trip.
I loaded 15 today doing everything I can to ensure a quality round and may get to try them again this week. I used all PPU cases this time also just as an extra caution!

New Kahr Auto Ordnance! Firing pin is free floating and hammer spring feels fine and fired factory ammo fine!
Thanks!