Load data for 220gr Bullets [Archive] - Glock Talk

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mleeber
11-29-2012, 20:41
Gents,
Getting back into 10mm after a 5 year layoff. I will be loading everything from 135JHPs to 220TCs. I have data for all but the 220s (loaded them once before but did not keep the data). Anyone done any testing with 220s and a stock G20 barrel? I will ultimately add a 6" barrel to the stable but for now I will be using the stock barrel in my Gen4 G20. I have a wide assortment of powders on the shelf so any load data would be appreciated. Initial leaning is towards N105 or Longshot. Also, I am looking to load close to max, I do not need plinking rounds.
Thanks!

SDGlock23
11-30-2012, 09:19
I've messed with them in 10mm and .40 using 800x, and I'll try and find the data.

ca survivor
11-30-2012, 09:20
I strongly suggest you buy a good reloading manual, then you can compare data given to you from the "INTERNET"

_The_Shadow
11-30-2012, 10:20
You will need to study the data on the powder manufactures websites and some reloading manuals but you will find some very interesting stuff in top of this forum for various test people have done with different powders.

You can also venture over to this new 10 firearms website and review some current activities specific to 10mm...http://10mm-firearms.com/index.php

Any Cal.
11-30-2012, 13:12
7.5g Longshot under a 220 will get you @ 1040ish in the stock barrel if I remember right. 7.8 showed the very first start of a smile, just a faint line. I did get to 1200, but got badly smiled brass. I actually started too hot, that is how I ended up @ 1200 with smiles.

You could probably work in the area of 200g jacketed start loads for a general ballpark #.

mleeber
12-10-2012, 13:57
Thanks for all the feedback!
I have no less than 12 reloading manuals from bullet and powder manufacturers but 200gr is the heaviest bullet they list so I have gone that route already with no success.
I have some Longshot on the shelf as well as some Blue Dot so I will start with those. I used N105 in an open gun with 38 Super Comp and man does that powder generate some gas, great for something with ports in the barrel. I am looking for a slower powder so that I can fill the cases as much as possible and N105 certainly fits that bill. Once I decide on a load I am going to "binge" and load a ton of 10mm and 45ACP seal the primers, and store them; a full case stores better than a half full one. I will be loading at or very near max on both calibers.

So, how many of you are using magnum primers in your 10mm???

_The_Shadow
12-10-2012, 14:37
Did a pull down of the Underwood cartridges 135-220 gr rounds...the breakdown is listed here;
http://10mm-firearms.com/factory-10mm-ammo/underwood's-lineup-135155165180220/

TDC20
12-10-2012, 21:55
So, how many of you are using magnum primers in your 10mm???
I've tried it and found it to be less than helpful. Some people use them, but I've found that standard primers (CCI#300) and a few tenths of a grain more powder in general will give you the same velocity with less pressure. Some powders, like Blue Dot, are more sensitive to magnum primers than others. IMO, if I were going to use magnum primers, I would back down a bit on the powder charge and work up to a safe pressure/velocity.

Taterhead
12-10-2012, 22:03
I've tried it and found it to be less than helpful. Some people use them, but I've found that standard primers (CCI#300) and a few tenths of a grain more powder in general will give you the same velocity with less pressure. Some powders, like Blue Dot, are more sensitive to magnum primers than others. IMO, if I were going to use magnum primers, I would back down a bit on the powder charge and work up to a safe pressure/velocity.

This is my experience as well. The only 10mm loads I use with magnum primers are a couple of pet loads with A9 powder. I don't use mag primers because standards did not work, it is because I did the load workups years ago with mag primers. I found a couple of loads that run very well and have just not taken the time to re-work with standard primers.

Otherwise, CCI 300s or WLPs run everything. 90%, at least, of my loads are run with CCI 300s. Blue Dot, LongShot A9, A7, A5, and 800-X.

SDGlock23
12-11-2012, 08:33
220gr SNS Casting TCFP
8.2gr 800x, CCI LP primer
1.260" New Starline brass

Glock 20sf w/4.6" KKM bbl:
1147 fps avg (31 fps extreme spread)

G20L 6.6" LW bbl:
1231 fps avg (34 fps extreme spread)

I see in the link above that Underwoods uses at least 8.4gr. Several months back I pulled some 10mm Underwoods 180gr and 155gr to see 800x powder in them.