First, check out these Remington 125gr JHP rounds I've been holding onto since the late '70's.
(https://s20.postimg.cc/5sib337a5/Rem_125gr_JHP_plus_P.jpg) (https://postimages.org/)
(https://s20.postimg.cc/enj5dlgn1/7.3_grains.jpg) (https://postimages.org/)
(https://s20.postimg.cc/40pc860rx/7.3_grains_Up_Close.jpg) (https://postimages.org/)
(https://s20.postimg.cc/y5dstjlal/124_grains.jpg) (https://postimages.org/)
A lot of powder for a little over 900 fps..
Here is how this ammo shot out of a 4" 686 at 25 yards;
(https://s20.postimg.cc/40pc86vn1/R-_P_125gr_JHP_plus_P_factory.jpg) (https://postimages.org/)
Now, the Remington UMC 125gr JHP +P
(https://s20.postimg.cc/7mv5kqeu5/R-_P_UMC_125_JHP_plus_P.jpg) (https://postimages.org/)
(https://s20.postimg.cc/ru8ld1rr1/DSC01622.jpg) (https://postimages.org/)
Cartridge is from Ammo Manufacture: Remington USA
Muzzle Velocity; Advertised: 945 fps
Actual Instrumental Velocity: 877 fps; 4" barrel; 52°F // 846 fps; 2½" barrel; 60°F
Muzzle Energy; Advertised: 248 ft. lbs.
Brass Make/Head Stamp: R-P 38 Special +P
Bullet Make/Weight/Construction/Info: Remington 125gr Jacketed Hollow Point .3579" dia
Actual Weight: 125.2grs.
Crimp diameter:
C.O.A.L.: 1.522"- 1.527"
Primer: Rem
Case: Brass
Powder Description/Positive ID/Type/Charge Weight: 6.0 grs. Small flake
(https://s20.postimg.cc/7zmjqx4tp/DSC01629.jpg) (https://postimages.org/)
(https://s20.postimg.cc/wg4plekzx/DSC01630.jpg) (https://postimages.org/)
(https://s20.postimg.cc/i9oyq6hul/DSC01631.jpg) (https://postimages.org/)
Here is how this ammo shot out of a 4" 686 at 25 yards;
(https://s20.postimg.cc/67tkw0619/REM-_UMC_125gr_JHP_plus_P.jpg) (https://postimages.org/)
And here is how this ammo shot out of a 2½" Model 66 at 15 yards;
(https://s20.postimg.cc/4ss07bf8t/REM-_UMC_125gr_JHP_plus_P_2-half_inch.jpg) (https://postimages.org/)
fixed image code The_Shadow