16ga.com ~ View topic - Scotch Tape Technique for tighter patterns

Member Joined: 06 Oct 2007 Posts: 2564 Location: West MI

Wouldn't the tape be acting like mylar wrap in the load/wad? and by sorts adding a couple thou of on-board (pre-choke) constriction to the wads' ID??

interesting, cut shells/frangible slug...wow...and some worry about shooting 2 3/4" shells in a 2 1/2-9/16" chambered gun. I can only imagine the sharp recoil when that full dimension outside diameter "slug" went through the forcing cone...jeeps&chryslers! I'll bet he only could shoot once out of self preservation...in essence shooting a contained 12g load through a 16ga forcing cone...or 10ga load->12ga cone...wow....something new every day.

Neat stuff, thanks for sharing....

believe it or not : quite common in 410's and back in their day , activ cases . Had several 16 screamers from activ's after MANY reloads . Would sever at that false brass moulding . Never knew it till the case came out - never damaged the m12 that they went out of .

Lots of folks had shoot-offs with Federal 410 hulls when loaded with 2400.
Most of that seemed to go away with 296/H-110

The NSSA rules call it this way Very Happy

Page 31 of the rule book

12. Defective Ammunition
a. Defective Ammunition will be defined as:

4) Separation of brass from casing when gun is fired (usually accompanied by a whistling sound as the plastic sleeve leaves the barrel).

Mike

you got it Mike - now it's a DO-OVER whether hit or miss ... I still worry about the cows on the background hillside ! Miy screamers were with LIL GUN - absolutely none with 410 !.... back to the topic - UDF , i'll be watching what you see closely and testing myself - this would be great loads for the Davis left barrel ! ( both are cyl )

Member Joined: 24 May 2010 Posts: 74

Many years ago Herters marketed a plastic wad that had two slits down the sides but they were connected at the end of the shot cup.They called them there long range wads.Probably the reason that your weapon produces better patterns with the old paper casings is because of the forcing cones in the barrels.From what I understaand the barrels bored for plastic casings are different than those for paper.I wonder what kind of breech preasure you are producing with your loads.When a weapon starts kicking harder there is a reason.

A 1 1/8 oz load in a 5.75lb is the main culprit for the increased recoil, which is why I dropped down to 1oz. No problem. I'm sending my gun off to Keith Kearcher this week to have some action/extractor work done. I'll have it back in a few weeks and will continue my experiments then.

I've been on to this little trick for a number of years. Learned about it from reading up on 19th Century muzzle loading techniques for percussion doubles w/o any choke constriction. 19th Century waterfowlers used both woven wire shot cups and cut and formed heavy paper ones to add range to their patterns. Some of these cartridges could kill waterfowl out past 70 yards or more. I posted about this over 5 years ago.

Yes. It works. I use a wooden dowel of the right diameter placed inside the shot cup. This allows me to uniformly wrap some plastic tape around the petals w/o changing the inside diameter of the cup. Works very well.

No, the wads don't seem to occasionally flip over or interfer with the patterns. They do not have enough inertia to stay with the pellets. Air resistance strips them away well before they can flip or effect the shot column. However, I'm betting a perfectly square muzzle crown is a must here. It is for accuracy w/ slugs as well.

PS, it's a bit sneaky, but I've found it works well for 12 ga Annie Oakley loads too. Laughing

Annie Oakley likes Cheerios Very Happy

Joined: 26 Apr 2010 Posts: 3313 Location: NCWa

I thought Annie liked Marlins- anyone but the Yankees Mad

Hi Mark - don't want to let this post get lost as it's an interesting thing . did some minor testing on a grease board and appeared to tighten slightly out of the left Davis barrel . Just visual though as it was gooey grease with the heat ! Any furthur tries on your part ?

After talking to Mr Skeetex on the web , did another grease bd test . Nothing scientific . Per his ins , 2 wraps tape around a g28 wad , in an rst , 20grns unique , 7/8 of 7.5's . Shot an untaped identical load at 28yds (no reason) , marked the extreme spread with a stick up and down and sideways , regreased and shot the taped shell . I would say 4-5 '' less spread in both directions . Like I said , not scientific , BUT , any rooster anywhere inside the perimeter would have been hit hard ! I also broke the petal connectors - I have a hard time believing that they do not affect patterns in an open gun . There is no full choke to retard the wad , and almost any wad recovered is still intact . In this case , the only variable was the tape . The pattern was quite uniform by the way .

Trouble maker Very Happy

Thanks for the report

Mike

no trouble in the pot , Mike . Give credit where it's due ! If this works consistently , it is a really great tool for fixed open chokes . Between this and spreaders for tighter chokes , it is Major useful ! thanx

some more idea's about long range loads .