16ga.com ~ View topic - 16 ga 2 1/2 inch hulls using Remington SP 16 ga wads

Joined: 02 Jun 2019 Posts: 1 Location: United States

I need load data for 16 ga 2 1/2 inch hulls using Remington SP 16 ga wads. Does anyone have any information?

*Last edited by skeettx on Mon Sep 09, 2019 1:02 pm; edited 2 times in total*

WELCOME on your first posting Smile

What payload are you wanting to use? 7/8 or 1 ounce?

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Joined: 04 Mar 2019 Posts: 1837 Location: Central ND

Are you roll crimping? If you are, any load that is listed at 2 3/4" will fit into a 2 1/2" roll crimped hull.

Joined: 28 Dec 2017 Posts: 87 Location: Northern Utah

If the stack fits in a shorter hull, will pressures go up?

I have an 9/8 oz load that is to short for 2 3/4 inch hulls it requires overshot cards and stuff. It fits perfectly in a 2 1/2 but I wasn't sure if I could do that safely or not.

Guest

That's a really good question.

Member Joined: 09 Jan 2013 Posts: 2168 Location: Florida

Tom Armburst says Yes . How much is the question , depends on the load .

Joined: 04 Mar 2019 Posts: 1837 Location: Central ND

I do not see how a shorter hull makes pressures increase. Tapered wall hull yes, maybe sometimes, straight wall hull no.

If I take a load that is too short for a Federal 2 3/4" hull(that it was tested in) and I cut 1/4" off it so that the wad column height, without all the fillers, is correct, and crimp it, that pressure isn't going to go up. Maybe a few hundred pounds because you took away the fillers.......but nothing worth a look. Some of the non-tox stuff reacts a little more when you get rid of fillers, but even then.

Why? Because you have not changed the size of the combustion chamber(hull walls, basewad, wad obturating cup). Peak pressure happens very early on in the process, as in before the wad clears the hull.

Now if you start changing the size and shape of the combustion chamber, you have the chance of something actually changing..

It is very load dependent.

Joined: 28 Dec 2017 Posts: 87 Location: Northern Utah

So cheddite 2 3/4 vs cheddite 2 1/2 + same internals?

Joined: 04 Mar 2019 Posts: 1837 Location: Central ND

Yes, Cheddites are pretty much all the same. What little differences there are make no difference.

Translation:

The 2 3/4 Cheddite with pie crimp
and
the 2 1/2 Cheddite with roll crimp
have about the same useable internal volume.

Mike

Joined: 28 Dec 2017 Posts: 87 Location: Northern Utah

2 1/2 with a pie crimp is what im thinking.

Joined: 04 Mar 2019 Posts: 1837 Location: Central ND

Bret,

Where did the original data come from? Generally (not always) most good data goes along with loads that fit reasonably well.

Member Joined: 09 Jan 2013 Posts: 2168 Location: Florida

Joined: 22 Feb 2019 Posts: 63 Location: United States

If you change to a short hull the internal volume is less so Tom is correct. the pressure rize may be significant in a very few cases . I load 25 grns of L.S. in both 70mm and 65mm hulls with 1oz lead both loads are fine.

If you need a cutting tool to make shorts PM me

Joined: 04 Mar 2019 Posts: 1837 Location: Central ND

fn16ga,

I am really not doubting what Mr. Armbrust told you......just that there are a lot of if, and and buts attached. Very load dependent....generally mild lead loads in straight wall hulls don't change much.