Reloading Podcast 254 - Pins and Heat

Hello, and welcome to the Reloading Podcast here on the Firearms Radio Network.  

Tonight the guys are talking decapping pins, annealing, and a good starting book.

  1. Jayson Friedman posted in TRR …. Any advice on loading 124grn 9’s sub and still cycling the sig p365 slide.

  2. Kole Everhart posted in TRR --- Thank you for all the help, I was able to get new decapping pins on order. What's the budget approach to dealing with crimped primer pockets?


    1. A few suggestions from the members:

      Anthony Stonecipher Heavy duty decap pin.
      Glen Meisner Sharp drill bit in your hand.
      Jon Denning Decap then swage or ream so you can reprime. You will not be able to reprime if you don’t.
      Michiel Ayers Mighty Armory makes a de-cap and swager in one unit, great product.

    2. RCBS swager combo 2

    3. Dillon Super Swage 600

  3. Kole Everhart posted in TRR: In need of help. I bought 223 rcbs ar series dies and had the decapping pin break almost instantly. RCBS offers a couple different styles of decapping pins, does anyone know which ones I need?

  4. Eric Robertson posted in TRRG I’m hand-annealing, and feel like I can get decently consistent results (hand drill on slow speed rotating the case in a deep well socket, neck and shoulder over a propane torch, counting to a metronome). I’ve been dropping the rounds into a dish of water to quench them when I finish the heating. Any issue with that? Should they “air” cool?

    1. Tempilaq

  5. Tyler N Trisket posted in TRRG: I'm looking to get into reloading I've been saving my brass from federal for when I get equipment and knowledge. 9mm 223 and 50ae. What's recommended to start with on the research path like books or links to articles?

    1. ABC's of Reloading

  6. Todd Ferns posted in TRRG: I’m in need of some help I cast for and reload for a 1911 with powder coated bullets I just picked up a sig p320. Can I run cast bullets through that barrel. I know you can’t with a glock but I’m not sure about a sig. please help.



Hi My name is Travis and I'm sending this message to weigh in on the issue of chamber pressure as it pertains to the length of a barrel given the same calibre, bullet, brass, etc... and whether you would see higher pressure.

The chamber pressures from one to the other will be the same essentially unless there is a major discrepancy or variation in chamber dimensions. The barrel length will increase the duration to which the pressure is able to take effect on the bullet as it pertains to acceleration. But when you will see the highest pressure is when the ignition occurs, and the pressure rises in the case before the bullet is dislodged from it's static location I.E crimped in its case. Jim mentioned previously how the bullet "Welds it self to the brass" when he was talking about his 280AI loads concentricity and how it would take adjusting seating depth slightly to release the mechanical lock of the bullet in the brass this is what is the cause of the high initial pressure. As the vessel increases the pressure will drop as was stated. The vessel being the space in the chamber and barrel behind the bullet as it leaves the barrel. The powder does have a greater amount of time to burn but as the bullet is down the barrel further it will help overall velocity but it won't make the pressure reach the initial pressure seen in the chamber at ignition before the bullet is dislodged. Additionally this is why jamming a bullet into the lands can be so dangerous as this is one of the biggest reasons that one will see extreme pressure spikes. My best regards to you all from Down here in DIckeyville Wisconsin not too far from Mike over near Madison WI, Keep up the good work guys..

I'm an avid handloader for precision shooting, and I do my fair share of "reloading" as well for plinking pistol rifle, and shotgun. Ranging from 9mm up to 300 RUM.





Cartridge corner: .22-243 Winchester


.22-243


History


The .243 Winchester cartridge released in 1955 was without a doubt, an immense success. The demand for the .243 ensured large supplies of inexpensive, readily available brass and this in turn made the .243 an ideal candidate for wildcatting.


By the early 60's wildcatters were experimenting with versions of the .243 case necked down to .224. Of these, two wildcats were standardized by reamer and reloading die makers. Both designs remain popular to this day. The first version is the .243 necked down to .224 with no other change and is designated as the .22-243 Winchester. The second version was created by Paul Middlestead of California and features a sharper 30 degree shoulder, which in turn gives a longer neck for flexible bullet seating. This latter cartridge was named the .22-243 Middlestead and is currently the more popular of the two.


Performance

The .22-243 is of course most effective as a varmint cartridge. On medium game, performance is relative to shot placement, bullet construction and range. The .22-243 can be a very spectacular killer with attention to the above factors. On light bodied game this cartridge is fast killing out to 125 yards and clean killing out to around 325 yards (impact velocities of 2600 fps and above)


The .22-243 seldom produces hydrostatic shock, especially in comparison to the parent .243 cartridge.  Recoil is lower than the .243 but not to a greatly noticeable degree. Noise from the ultra supersonic crack of projectiles traveling at 3800fps can be extremely painful when hunting in the field without earplugs.

More notes on performance can be found in the .220 Swift text which is the main body text for the ultra velocity .22’s


1 banner advert resize

Factory Ammunition

No factory ammunition is produced for this wildcat cartridge.


Hand Loading

In either version, the .22-243 gives higher velocities than hand loads for the Swift and performs similarly to the .223 WSSM. The .22-243 does it's best work with the same powders that give top performance in the Swift and WSSM. ADI 2208 (Varget) and 4064 work well with bullets up to 55 grains while ADI 2209 or IMR 4350 work well with 60 grain bullets and heavier.


From a 24” barrel, safe working maximum velocities include 4150fps with 50 grain bullets, 3900fps with 55 grain bullets while 60 to 65 grain bullets can be driven over 3700fps. 69 to 70 grain bullets achieve between 3400 and 3500fps while the heavy 80 grain Hornady A-Max can be driven at up to 3300fps.

Because rifles of this caliber must be custom built, the .22-243 owner has an advantage in having a choice of barrel twist rate. If the rifle is to be used on varmints through to light medium game. 1:12 twist barrels offer the possibility of experimenting with low stability FMJ projectiles. The 1:9 twist optimizes the use of heavier bullet weights.


To avoid repetition, readers are advised to study projectile performance as discussed throughout the other .224 references in this knowledge base.


Closing Comments

The .22-243 is a common sense wildcat capable of turning out first class accuracy. This cartridge should seriously be considered by anybody wishing to obtain an ultra flat shooting varmint cartridge. As a medium game cartridge, the .22-243 is particularly well suited to the light bodied animals weighing around 40kg (90lb) but certainly does not offer superior performance to the parent .243 Winchester cartridge.


Suggested loads: .22-243 Barrel length: 24”

No ID Sectional Density Ballistic Coefficient Observed  MV Fps ME

Ft-lb’s

1 HL 53gr Barnes TSX .151 .231 3900 1790

2 HL 55gr FMJ .157 .272 3900 1857

3 HL 60gr Nosler Partition .171 .228 3750 1873  

Suggested sight settings and bullet paths

1 Yards 100 150 256 296 350 400

Bt. path +1.6 +2 0 -2 -6 -11.5

2 Yards 100 150 267 310 350 400

Bt. path +1.5 +2 0 -2 -5 -9

3 Yards 100 150 251 291 350 400

Bt. path +1.6 +2 0 -2 -6.6 -12  

No At yards 10mphXwind Velocity Ft-lb’s

1 300 9.6 2570 776

2 300 8 2717 901

3 300 10 2443 795  

Note: Load No.2 can be used to plot trajectory for of 55gr Hornady V-Max.


22 243 final.jpg

Imperial Metric

A .473 12.01

B .471 11.96

C 30deg

D .454 11.53

E .260 6.60

F 1.560 39.62

G .300 7.62

H 2.045 51.94

Max Case 2.045 51.94

Trim length 2.035 51.7  



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