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Member Joined: 30 Nov 2011 Posts: 1696 Location: Minnesota

In regards to this load:
Fed hull
ww 209
25 gr 4756
AA16 wad
1210fps
1 oz lead
My question - can anyone hazard a guess what it would do to the velocity if I drop the powder to 23 grains? I don't have a chrony. Thanks

it will be slower. That is all that can be said.

My favorite loads use SR4756 and I have chronographed 28 gr. and 1 oz. at 1178 fps.,and 30 gr. with 1 oz. at 1238 fps. BUT, I use card and fiber wads. Interesting that 3 gr. less, with 1-piece plastic wads would have higher velocities than C&F wads. There are a lot of factors involved and I'm assuming that your velocity is that published in your reloading manual.

Member Joined: 30 Nov 2011 Posts: 1696 Location: Minnesota

Mr Schultz The load is from the low pressure tables here. Thanks

I am certainly not a ballistics expert but I think there are a lot of factors in the performance of loads other than the components. I have sent in shells that I reloaded with all hand measured components and gotten significantly different results than published data. I have seen the exact same load published in different sources with significantly different velocities and pressures. I think that if you are truly going to test a load it needs to be reloaded by multiple different people and tested by different people on different equipment and n=5 does not even come close to cutting it. At this time I am content with a load that is well within safety parameters and performs more consistently than I do. Laughing

Usually you can figure between 25 to 50 FPS velocity change, if you add or subtract 1.0 grain of powder on a reasonable load.

The problem with this load, it is fairly anemic to start with, so the drop off in velocity could be more.

The best thing is to find a buddy with a chronograph and check a string of 10 rounds.

FYI, That load is in the Hodgdon reloading data.

Member Joined: 30 Nov 2011 Posts: 1696 Location: Minnesota

Thanks for the quick replies. Smile

The Handbook of Shotshell Reloading (Couger, 1989) has this load in the Federal hull: 1 oz. W209 23.5 gr. SR4756 Rem R16 1180 FPS 6800 LUP
TerryS

Member Joined: 30 Nov 2011 Posts: 1696 Location: Minnesota

Thanks Terry, I loaded a box up at 23 gr even, so I should be rite about where I want to be. Going to try them tomorrow on trap.

Member Joined: 30 Nov 2011 Posts: 1696 Location: Minnesota

Shot this load simultaneously last nite with my same load using Herco 19 gr and my "base" load of factory RST 1 oz lites. All seem to crush the clays equally well and couldn't tell any difference in recoil between the 3 so I'm calling it a success. Thanks for all the input.

As DC has already pointed out, this load is a mild one. Going down to 23 grains. Average load pressures won't be a problem.

However, a word of caution is wise here regarding WW16AA vs. Remington R16/SP16 wads. The WW16AA wad design, it's clones, and close copies are far more efficient than the R16/SP16 designs. If all else is equal, the Winchester wad design will raise pressures, and vice versa.