9MM Recipe check for a newbe

[Jeff J]

Newbe here looking for some friendly advice about load data for 9MM using X-treme bullets. Using 124gr RN and HP. Brass is mixed, primers are CCI 500 and /or Winchester WSP (have both), 4.6gr Unique (want to start low and work up). After looking at different manual, online and factoring in the .016 OAL variance that the Dillon RL550B states is normal I came up with 1.150 for the RN and 1.125 for the HP. Any advice or opinions would be greatly appreciated. Thanks Jeff

[Mot Mi]

Newbe here looking for some friendly advice about load data for 9MM using X-treme bullets. Using 124gr RN and HP. Brass is mixed, primers are CCI 500 and /or Winchester WSP (have both), 4.6gr Unique (want to start low and work up). After looking at different manual, online and factoring in the .016 OAL variance that the Dillon RL550B states is normal I came up with 1.150 for the RN and 1.125 for the HP. Any advice or opinions would be greatly appreciated. Thanks Jeff

I load my 124 to 1.250 as well when checking 3 different brands of factory ammo they were all 1.250 for rn but you can go from 1.240 to 1.260

[J-cat]

Can't work up a load using mixed brass because they all have different capacities.

[bigedp51]

Jeff J

J-cat is correct that mixed brass will give a wider variation in pressure velocity and group size.

On the flip side close range shooting like USPSA matches many shooters use mixed range pick up brass because it impossible to find all their fired cases.

The problem with mixed brass is variations in case capacity, brass hardness, thickness and how tight its grip is on the bullet. All these will effect pressure and velocity and your group size.

Work up your loads with one type of brass for uniformity and then decide what your accuracy requirements are for the range you are shooting. Meaning you will not see much difference at close range with mixed brass,
"BUT" if your trying to hit a target at 50 yards it can make all the difference in the world.

[Jeff J]

Thanks for the inputs. I will sort through and pick out matching brass. Maybe I should have stated, attending a reloading work shop and buying a RCBS 9361 kit didn't work out as planed and I bought some used equipment. This is the first time reloading anything and just working up 10 test rounds with the stuff I bought.
X-treme bullet says use mid-range FMJ data. With OAL varying from one bullet manufacture to the next and a machine variance of .016. Do you take the MAX OAL of 1.169 and subtract .016 or split the .016 and subtract .008? When you find a load you like and start crank out rounds, how often do you use your case gauge and check your powder charge?
Thanks Jeff

[uechikid]

Can't work up a load using mixed brass because they all have different capacities.

Freedom Munitions does it every day and their reman ammo is great.

[J-cat]

You are confusing manufacturing with development.