Bug Some kind of Memory leak?

[SpudGunMcGee]

Hey there everyone, i'm in the process of making a modpack for myself and others and have a bit of an issue. The modpack loads fine and all the mods are working properly, but on creating a new world the game freezes up quite a bit. I can get into the world and move around, but the game eats up all the ram and then proceeds to freeze up every second. I was wondering if any of you guys had an idea as to what is causing this problem.

Here's a link to the modpack, there is a list of mods in the description:
https://minecraft.curseforge.com/projects/spud-gun-pack

I have 6gb of ram allocated to Minecraft, here's a quick overview of my pc specs if that helps at all.

Spoiler: PC Specs

Operating System:
Windows 10 Pro 64-bit
CPU:
Intel Core i5 3570K @ 3.40GHz 37 °C
Ivy Bridge 22nm Technology
RAM:
16.0GB Single-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard:
ASRock Z77 Pro3 (CPUSocket) 37 °C
Graphics:
VS248 (1920x1080@60Hz)
VS248 (1920x1080@60Hz)
Intel HD Graphics 4000 (ASRock)
4095MB NVIDIA GeForce GTX 1070 (ASUStek Computer Inc) 37 °C
ForceWare version: 382.33
SLI Disabled
Storage:
232GB Samsung SSD 850 EVO 250GB (SSD)
931GB Western Digital WD1002FAEX-OOY9A0 (SATA)
465GB Western Digital WDC WD5000AAVS-00ZTB0 (SATA) 33 °C
465GB Western Digital WDC WD5000AAVS-22G9B1 (SATA) 34 °C
Optical Drives:
No optical disk drives detected
Audio:
Corsair Gaming H2100 Headset

Thanks for any help in advance.
-SpudGun