Larger shot sizes retain their velocity and energy better than smaller shot sizes. The key here is the distance to target. Lead 4's or 5's launched at 1200 fps may be going faster at 40 yards than 6's or 7 1/2's launched at 1400 fps.
Recoil of 1 1/2 oz at 1400fps will be way into the uncomfortable range.
Federal Gold Medal and the old Activ hull have more room inside than the WW and STS hulls.
I don't think you are going to find that one in that length hull. You can get 1350 fps with an Active hull and 1 3/8 oz shot. You can buy Federal Prairie Storm 2 3/4 shells with 1 1/4 oz lead at 1500 fps. (My crane load is the 3" Prairie Storm 1 5/8oz #4 shot @ 1350 fps). AJ
The problem with federal gold medal hull is that they won't stay together with 1 3/8 game loads. The hull separates 50 to 60 percent of time. Sending part of the case down the barrel could be hazardous if shooting in a hunting situation were you don't check the barrel in between shots. This is on the plastic hulls. I have not had this problem with federal papers.
1400 FPS is pretty wicked in a 2 3/4 1 1/2 load. I have never seen that velocity listed. As far as a good patterning load, I have never been able to beat 34 grains of Blue dot with an RP12 and a fed 209a in a Gold meadel hull. Published load about 1250 is memory serves. There has never been a Pheasant able to outrun this load. Jeff
P.S I load the old style Gold meadels so they do not separate.
When it was legal to shoot lead at ducks I would load some 1 3/8 oz copper plated 5's
Winchester Compression formed case (2 3/4"), WW 209, WAA 12R wad, 39.5 grains of Winchester 571 powder. Extremely good load out to 50 yards.
The best I could find in a 1 1/2 oz load traveled at 1260 fps. I would shoot these at geese when lead was still legal for waterfowl.
A friend of mine had asked me to look at loading him some shells. I don't hunt birds anymore. I checked for data as some of you have indicated, there isn't any for the parameters that he gave me. I talked to him and he wants to try an 1 1/4 oz. load.
jhoward is correct that the 4 1/4 dram Kent is punishing but there's nothing like literally smoking a target in a long yardage killer on the 5th shot!
Seriously, they work for me but at 1465 fps, can't shoot more than a half/box sprinkled through the evening. Don't know why anybody would want this load for a pheasant! The 1 1/4 oz your friend decided to try is more than enough.
I have shot some of the Kent 4 1/4--1 1/2 oz. loads on the Annies. Very few shooters can tolerate the recoil. I had 2 boxes of them left. Opened them up and reduced shot to 1 3/8 oz. Recoil is still very bad. 1 1/4oz loads at 1330 fps.
with #5 or #6 shot will break as many long range targets and the recoil is manageable. I have tried just about everything for extremely long shots. No more kents!
1-1/2 oz at 1400 fps will kill at both ends - what is it that your friend wants to kill with that load? I hope he is not planning on shooting it in anything lighter than 10 lbs weight. 1-3/8 oz shells are commonly available in 3" and 1-1/4 in 2-3/4" shells. Fiocchi has a load available in 1-3/4 oz at 1200 fps.
Bill, without knowing how young, tough or whatkind of gun your friend uses, I'll make a suggestion that if your friend wants speed to stick to 1.125 loads. But I guess it matters not to me wether he wants to stay in the gun after an hour of shooting.lol
Dr Honk, I think that load used 35.5 gr with an AA12R.